DIY science-comms, results

At FLEET, we have put significant work into helping scientists develop communication skills (see the case study) and over FLEET’s seven year tenure we published many stories written by FLEET researchers. In most cases, these are stories aimed at a more technical audience, for example published on platforms such as Phys.org, or Materials Australia magazine. While such articles are certainly …

FLEET researchers unveil new approach to magnetic topological insulators

Researchers from Monash University, part of the FLEET Centre, have revealed a generic approach towards intrinsic magnetic second-order topological insulators. These materials are crucial for advancements in spintronics, an emerging field aiming at using spin degree of freedom to deliver information. Background Two-dimensional ferromagnetic semiconductors, such as CrI3, Cr2Ge2Te6, and VI3, have been extensively studied in recent years. These materials …

Overcoming magnetic disorder: towards low-energy topological electronics

  Overcoming magnetic disorder is key to exploiting the unique properties of QAH insulators. The Monash-led team demonstrated that the breakdown in topological protection is caused by magnetic disorder, explaining previous observations that topological protection could be restored by application of stabilising magnetic fields. “The study paves a clear research pathway towards use of MTIs in low-energy topological electronics,” says …

Scanbot: Streamlining materials research with STM automation

Automating time-consuming tasks to fast-track materials research A new open-source software package developed by Monash University researcher Julian Ceddia aims to significantly streamline the study of materials using Scanning Tunnelling Microscopes (STMs). The software, named Scanbot, automates the time-consuming probe optimisation and data acquisition processes essential for STM experiments, helping to accelerate 2D materials research by enabling detailed investigation after …

Ultra-high spectral purity revealed in exciton-polariton laser

Ground-breaking research revealed the ultra-narrow linewidth of a novel type of laser that operates without population inversion. Exciton-polariton lasers, renowned for their low-power operation, have long tantalised researchers with their promise for practical low-energy applications. However, until now, a clean measurement of the laser’s linewidth, or spectral purity, has remained elusive. “The spectral purity is one of the defining characteristics …

Dark excitons shed new light on matter

A team of Monash researchers have uncovered for the first time the full effects of interactions between exciton-polaritons and their associated dark excitonic reservoir. Exciton-polaritons (‘polaritons’, for short) are hybrid mixtures of light and matter that inherit the best properties of both. They form in semiconductors sandwiched between two mirrors, through which a laser is shone. “Polaritons capture useful properties …

When does a conductor not conduct? Switching a 2D metal-organic framework from an insulator to a metal

A switchable material based on electron-electron interactions. An Australian-led study has found unusual insulating behaviour in a new atomically-thin material – and the ability to switch it on and off. Materials that feature strong interactions between electrons can display unusual properties such as the ability to act as insulators even when they are expected to conduct electricity. These insulators, known …

Pioneering study achieves liquid-metal transfer via electrical current

first published at the University of Wollongong In a ground-breaking discovery, University of Wollongong (UOW) researchers, have reached a new milestone in soft-matter transport. The team, based at the UOW node of the ARC Center of Excellence in Future Low Energy Electronics Technology (FLEET), has successfully demonstrated the transfer of liquid metal from an anode to a cathode without short circuiting, defying …

Solving quantum mysteries: New insights into 2D semiconductor physics

Researchers from Monash University have unlocked fresh insights into the behaviour of quantum impurities within materials. The new, international theoretical study introduces a novel approach known as the ‘quantum virial expansion,’ offering a powerful tool to uncover the complex quantum interactions in two-dimensional semiconductors. This breakthrough holds potential to reshape our understanding of complex quantum systems and unlock exciting future …

Examining the superconducting diode effect

A collaboration of FLEET researchers from the University of Wollongong and Monash University have reviewed the superconducting diode effect, one of the most fascinating phenomena recently discovered in quantum condensed-matter physics. A superconducting diode enables dissipationless supercurrent to flow in only one direction, and provides new functionalities for superconducting circuits. This non-dissipative circuit element is key to future ultra-low energy …

‘Topological gardening’ to achieve unexpected spin transport

‘Trimming’ the edge-states of a topological insulator yields a new class of material featuring unconventional ‘two way’ edge transport in a new theoretical study from Monash University, Australia. The new material, a topological crystalline insulator (TCI) forms a promising addition to the family of topological materials and significantly broadens the scope of materials with topologically nontrivial properties. Its distinctive reliance …

Listening to nanoscale earthquakes

A recent UNSW-led paper published in Nature Communications presents an exciting new way to listen to avalanches of atoms in crystals. The nanoscale movement of atoms when materials deform leads to sound emission. This so-called crackling noise is a scale-invariant phenomenon found in various material systems as a response to external stimuli such as force or external fields. Jerky material …

Space has gotten small with metallic, planet-like nanodroplets

Homogenous liquid-metal nanodroplets achieved with high-temperature molten salt Australian researchers put planets in the palm of the hand Liquid metal, planet-like nanodroplets are successfully formed with a new technique developed at RMIT University, Australia. Like our own Planet Earth, the nanodroplets feature an outer ‘crust’, a liquid metal ‘mantle’, and a solid ‘core’. The solid intermetallic core is the key …

Getting wavy: New FLEET Schools Forces and Energy resource goes from Newton to Einstein

Learning about ‘wavy’ stuff you can’t see, smell, taste or touch can test students’ intuitive understanding of the world. FLEET’s latest Forces and Energy teacher resource examines energy from the physics of Newton to Einstein, to the wavy behaviour of sub-atomic particles such as electrons. Students learn how energy is crucial to our understanding of how everything in the universe …

Inspiring outreach, with bombs and light circuits

Teaching energy, releasing creativity, and inspiring future scientists FLEET and Monash volunteers used catapults, graphite circuits and diffraction goggles to create challenges for 250 Mater Christi College students competing to win their annual STEM Cup. For the STEM Cup challenge, which is judged on teamwork, innovation and communication, FLEET designed two hands-on workshops that got middle and senior secondary students …

Combining irradiation and lithography to engineer advanced conducting materials

A process has been developed to engineer nanoscale arrays of conducting channels for advanced scalable electronic circuitry Using ion implantation and lithography, investigators created patterns of topological surface edge states on a topological material that made the surface edges conductive while the bulk layer beneath remained an insulator Low energy ion implantation, neutron and X-ray reflectometry techniques at ANSTO supported …

Destroying the superconductivity in a kagome metal

Electrically controlled superconductor-to-“failed insulator” transition, and giant anomalous Hall effect in the kagome metal CsV3Sb5 A new RMIT-led international collaboration published in February has uncovered, for the first time, a distinct disorder-driven bosonic superconductor-insulator transition. The discovery outlines a global picture of the giant anomalous Hall effect and reveals its correlation with the unconventional charge density wave in the AV3Sb5 …

Forging outreach relationships and taking nano and quantum to Rotorua schools

FLEET and MacDiarmid Institute members teamed up at the recent AMN10 conference in Rotorua NZ to conduct science outreach workshops for 320 local school students. Over four days, 25 volunteers from FLEET and partner organisation the MacDiarmid Institute visited seven schools and presented a variety of hands-on science workshops to students ranging from year 4 to 9, in a program …

Turning up the heat on topological thermoelectrics: FLEET Translation funding towards new chemical synthesis

FLEET funding is supporting the next step in possible translation of thermoelectrics research towards commercialisation in future generators, electronics, vehicles, human-wearable and environmental sensors, and smart electronics Thermoelectric materials offer potential solutions to heat-management challenges common to many electronics technologies. Thermoelectrics are solid-state semiconductors that can convert heat gradients into useful electricity (known as the Seebeck effect).  They can also …

Let it snow inside liquid metals

Liquid metals are enigmatic metallic solvents. A new UNSW-led study of metallic crystals growing in a liquid metal solvent finds similarities and differences between liquid-metal solvents and more-familiar crystal-growth environments (such as water or the atmosphere) in which snowflakes or crystals of dissolved substances form. We can dissolve a large amount of sugar in water at high temperatures. But as …

Creating a quantum spark in primary students

A FLEET Primary School pilot workshop showed primary students can learn and conceptualize quantum physics and are adept at the Mexican wave. Meanwhile, 155 Hughesdale Primary School students got their first introduction to quantum physics. The year 5 and 6 students explored the quantum atomic model via role-playing activities, applying this to understand how electricity and resistance work at the …

A shield for 2D materials that adds vibrations to reduce vibration problems

Ultra-thin, liquid-metal-printed oxide can improve performance of your transistor by suppressing vibrational resistance Counterintuitively, this occurs by adding extra phonons (vibrations) into the system This oxide can protect your transistor against further processing Monash University researchers have demonstrated a new, counterintuitive way to protect atomically-thin electronics – adding vibrations, to reduce vibrations. By ‘squeezing’ a thin droplet of liquid gallium, …

Learning to see yourself in an entrepreneur role: Sunrise Innovation Festival

FLEET PhD candidate Maedehsadat Mousavi’s has reported in following attending the Sunrise innovation festival, building on her experiences at the EQUS-FLEET Idea Factory: “Previously, I would have never considered starting my own company or launching a start-up, but now I can see myself considering this future, and how an entrepreneur can have an impact on the world.” FLEET HDR students …

Zinc batteries, cheaper safer better: FLEET Translation Program

FLEET Translation funding is progressing zinc-ion battery technology, which offers decreased costs, safety, and improved environmental outcomes. Current commercial batteries are primarily based on lithium-ion technology, which is expensive and has significant safety concerns owing to incorporation of flammable organic materials. The proposed aqueous zinc-ion battery technology boasts improved safety (no toxic or flammable components), low-cost manufacturing, and recyclability. The …

FLEET translation: extending LED device lifetime with liquid-metal printed oxides

2D oxide-based LED encapsulation extending device lifetime FLEET translation funding is supporting the next step in a liquid-metal printing application with significant commercial promise, in a project being led by RMIT PhD candidate Patjaree Aukarasereenont. Light-emitting diodes (LEDs) play a crucial role in modern society – from mobile phones to LED billboards and home lighting, LEDs are ubiquitous. There are, …

Magnetism or no magnetism? The influence of substrates on electronic interactions

How substrates influence magnetism in 2D materials Interaction-induced magnetism in metal-organic frameworks on substrates A new study at Monash University illustrates how substrates affect strong electronic interactions in two-dimensional metal-organic frameworks. Materials with strong electronic interactions can have applications in energy-efficient electronics. When these materials are placed on a substrate, their electronic properties are changed by charge transfer, strain, and …

A chemical reaction as good as gold

Gold may hold the key to unlocking an elusive but highly desirable reaction pathway. A new Australian-led stud finds gold atoms could be key to unlocking organic reactions. Organic molecules are the building blocks for materials we use every day – from our clothes and coffee cups to the screen displays of our phones. Controlling reactions of these organic molecules …

Electron Liquids on the Cutting Edge

FLEET Investigator A/Prof Bent Weber, and his team at NTU Singapore, have demonstrated unprecedented control of a one-dimensional flow of electrons in a rare quantum state that physicists have sought to understand for over half a century. The technique suggests a path to more-robust and more-accurate quantum computers. From: Nanyang Technical University, Singapore As you walk in a crowded shopping …

A new era of two-dimensional ferroelectrics

A UNSW/Flinders University paper published recently in Nature Reviews Materials presents an exciting overview of the emerging field of 2D ferroelectric materials with layered van-der-Waals crystal structures: a novel class of low-dimensional materials that is highly interesting for future nanoelectronics. Future applications include ultra-low energy electronics, high-performance, non-volatile data-storage, high-response optoelectronics, and flexible (energy-harvesting or wearable) electronics. Structurally different from …

A drop in the sea of electrons: Understanding Fermi polarons and their interactions

Multidimensional coherent spectroscopy (MDCS) on monolayer WS2 reveals Fermi polaron interactions Phase-space filling drives new optical selection rules, where excitons compete for the same electron Identification of a novel, cooperatively-bound exciton-exciton-electron state Recent Australian-led research has provided a world’s first measurement of interactions between Fermi polarons in an atomically-thin 2D semiconductor, using ultrafast spectroscopy capable of probing complex quantum materials. …

Trapping polaritons in an engineered quantum box

High exciton-polariton density in an engineered quantum box Possible pathway to future, ultra energy-efficient technologies Australian researchers have engineered a quantum box for polaritons in a two-dimensional material, achieving large polariton densities and a partially ‘coherent’ quantum state. New insights coming from the novel technique could allow researchers to access striking ‘collective’ quantum phenomena in this material family, and enable …

Automation takes the misery out of scanning microscopy: FLEET Translation Program

FLEET Translation Program funding to automate the ‘boring parts’ of STM experiments, freeing up operators’ time Monash PhD candidate Julian Ceddia has been awarded funding from the first round of the FLEET Translation Program to further develop the automation of Scanning Tunnelling Microscopes (STMs), based on previous work from the group of his supervisor, Agustin Schiffrin. STMs are capable of …

What you see is what you get with pre-characterised TMDs: FLEET Translation Program

  First project approved for FLEET Translation Program funding PhD candidates Mitch Conway, Abby Goff, and Jack Muir have recently been awarded $31,000 in FLEET’s first round of funding from the FLEET Translation Program (FTP). Their cross-node collaboration between Swinburne and RMIT aims to create a catalogue of high quality 2D materials, namely transition metal dichalcogenides (TMDs) and their heterostructures. …

Manipulating interlayer magnetic coupling in van der Waals heterostructures

Electrical control of exchange bias effect in FePS3-Fe5GeTe2 van der Waals heterostructures via proton intercalations A RMIT-led international collaboration published this week has observed, for the first time, electric gate-controlled exchange-bias effect in van der Waals (vdW) heterostructures, offering a promising platform for future energy-efficient, beyond-CMOS electronics. The exchange-bias (EB) effect, which originates from interlayer magnetic coupling, has played a …

The hetero-interface is the device: a computational approach

Designing hetero-interfaces towards new optoelectronic functionalities using large-scale computations Assembling ‘Lego-like’ 2D ‘heterostructures’ can give rise to emergent properties and functionalities very different from the intrinsic characteristics of the constituents. Density functional theory (DFT)-based band-structure calculations can shed light on interfacial properties of different heterostructures. Interface properties of 2D perovskite/TMD heterostructures Heterostructures based on different 2D materials have resulted in …

Topological superconductors: fertile ground for elusive Majorana particle

Majorana fermions promise information technology with zero resistance A new, multi-node FLEET review investigates the search for Majorana fermions in iron-based superconductors. The elusive Majorana fermion, or ‘angel particle’ proposed by Ettore Majorana in 1937, simultaneously behaves like a particle and an antiparticle – and surprisingly remains stable rather than being self-destructive. Majorana fermions promise information and communications technology with …

Liquid platinum at room temperature: The ‘cool’ catalyst for a sustainable revolution in industrial chemistry

In an Exciton Science/FLEET study, researchers have been able to use trace amounts of liquid platinum to create cheap and highly efficient chemical reactions at low temperatures, opening a pathway to dramatic emissions reductions in crucial industries. When combined with liquid gallium, the amounts of platinum required are small enough to significantly extend the earth’s reserves of this valuable metal, …

Making a ‘sandwich’ out of magnets and topological insulators, potential for lossless electronics

Designer heterostructure is a potential high-temperature QAHE, where a topological material is sandwiched between two ferromagnets A Monash University-led research team has discovered that a structure comprising an ultra-thin topological insulator sandwiched between two 2D ferromagnetic insulators becomes a large-bandgap quantum anomalous Hall insulator. Such a heterostructure provides an avenue towards viable ultra-low energy future electronics, or even topological photovoltaics. …

Together we’re stronger: developing a new layered material for future electronics

A new RMIT-led study stacks two different types of 2D materials together to create a hybrid material providing enhanced properties. This hybrid material possesses valuable properties towards use in future memory and electronic devices such as TVs, computers and phones. Most significantly, the electronic properties of the new stacked structure can be controlled without the need for external strain, opening …

A zigzag blueprint for topological electronics

A collaborative study led by the University of Wollongong confirms switching mechanism for a new, proposed generation of ultra-low energy ‘topological electronics’. Based on novel quantum topological materials, such devices would ‘switch’ a topological insulator from non-conducting (conventional electrical insulator) to a conducting (topological insulator) state, whereby electrical current could flow along its edge states without wasted dissipation of energy. …

Bonding exercise: quantifying biexciton binding energy

Two-quantum multidimensional coherent spectroscopy (2Q-MDCS) quantifies precise biexciton binding energy Applications in future devices based on biexcitons in TMDCs A rare spectroscopy technique performed at Swinburne University of Technology directly quantifies the energy required to bind two excitons together, providing for the first time a direct measurement of the biexciton binding energy in WS2. As well as improving our fundamental …

Liquid metals, surface patterns, and the Romance of the Three Kingdoms

“The long divided, must unite; long united, must divide. Thus it has ever been.” The opening lines of the great Chinese historical novel Romance of the Three Kingdoms condense its complex and spectacular stories into a coherent pattern, that is, power blocs divide and unite cyclically in turbulent battle years. A good philosophy or theorem has general implications. Now, published …

Beyond scifi: Manipulating liquid metals without contact

In a landmark discovery, FLEET University of Wollongong (UOW) researchers have realised the non-contact manipulation of liquid metal. The metals can be controlled to move in any direction, and manipulated into unique, levitated shapes such as loops and squares by using a small voltage and a magnet. The liquid metal used is galinstan, an alloy of gallium, indium and tin, …

Trapping vortices in thin superfluid films

Physicists at the University of Queensland have shed light upon how tiny whirlpools (vortices) get stuck to obstacles in superfluids. Superfluids are a quantum substance that can flow without viscosity and hence do not slow down due to friction. A second defining feature of superfluids is that they only support quantised rotation – the vortices can only spin with strength …

Negative capacitance in topological transistors could reduce computing’s unsustainable energy load

Australian researchers have discovered that negative capacitance could lower the energy used in electronics and computing, which represents 8% of global electricity demand. The researchers at four universities within the ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) applied negative capacitance to make topological transistors switch at lower voltage, potentially reducing energy losses by a factor of ten …

Probing quantum gases with spectroscopy (Nature review)

December’s edition of Nature Physics is dedicated to ultracold quantum technologies, including a review of spectroscopic probes of quantum gases by FLEET’s Chris Vale (Swinburne), with MIT’s Martin Zwierlein. Ultracold gases are a laboratory for precision, many-body physics – delivering a wealth of insights into collective quantum phenomena, with direct implications for nuclear and condensed-matter physics. Spectroscopic techniques can probe …

Losing isn’t always bad: gaining topology from loss

Generating topology from loss in hybrid light-matter particles Observation of new non-Hermitian topological invariant in exciton-polariton system Losing particles can lead to positive, robust effects. An international collaboration has demonstrated a novel topology arising from losses in hybrid light-matter particles, introducing a new avenue to induce the highly-prized effects inherent to conventional topological materials, which can potentially revolutionise electronics. Led …

No more moving parts: Liquid metal enabled chemical reactors

Liquid-metal machines could wipe out maintenance issues for continuous flow reactors. Metals that are liquid at room temperature, such as gallium and its alloys, are attractive materials due to their unique electrical, thermal and fluidic properties. In a study published today, a research team led by UNSW, Sydney has shown that liquid metals can offer their characteristics to the pharmaceutical and chemical …

Quantifying spin in WTe2 for future spintronics

Spin-momentum locking induced anisotropic magnetoresistance in monolayer WTe2 Determining spin quantization axis, an essential element for fabricating spintronic devices, in 2D topological insulator WTe2 by measuring anisotropic magnetoresistance A RMIT-led, international collaboration published this week has observed large in-plane anisotropic magnetoresistance (AMR) in a quantum spin Hall insulator and the spin quantization axis of the edge states can be well-defined. …

Elements in liquid metals compete to win the surface

Some alloys are in the liquid state at or near room temperature. These alloys are usually composed of gallium and indium (elements used in low energy lamps), tin and bismuth (materials used in constructions). The ratio and nature of elements in liquid alloys generate extraordinary phenomena on the surface of liquid metals which have been rarely explored to date and …

Switching on a superfluid

Exotic phase transitions unlock pathways to future, superfluid-based technologies. We can learn a lot by studying microscopic and macroscopic changes in a material as it crosses from one phase to another, for example from ice to water to steam. But while these phase transitions are well understood in the case of water, much less is known about the dynamics when …

Electrons on the edge: the story of an intrinsic magnetic topological insulator

An intrinsic magnetic topological insulator MnBi2Te4 has been discovered with a large band gap, making it a promising material platform for fabricating ultra-low-energy electronics and observing exotic topological phenomena. Hosting both magnetism and topology, ultra-thin (only several nanometers in thickness) MnBi2Te4 was found to have a large band-gap in a Quantum Anomalous Hall (QAH) insulating state, where the material is …

Star attraction: magnetism generated in 2D organic material by star-like arrangement of molecules

2D kagome materials are a platform for tuneable electron-electron interactions ‘Star-like’ atomic-scale kagome geometry ‘switches on’ magnetism in a 2D organic material A 2D nanomaterial consisting of organic molecules linked to metal atoms in a specific atomic-scale geometry shows non-trivial electronic and magnetic properties due to strong interactions between its electrons. A new study, published today, shows the emergence of …

Home-grown semiconductors for faster, smaller electronics

‘Growing’ electronic components directly onto a semiconductor block avoids messy, noisy oxidation scattering that slows and impedes electronic operation. A UNSW study out this month shows that the resulting high-mobility components are ideal candidates for high-frequency, ultra-small electronic devices, quantum dots, and for qubit applications in quantum computing. Smaller means faster, but also noisier Making computers faster requires ever-smaller transistors, …

Identifying a topological fingerprint

Generating a topological anomalous Hall effect in a non-magnetic conductor anomalous planar Hall effect (APHE) the ‘smoking gun’ for the topological magnetic monopole in momentum space A FLEET theoretical study out this week has found a ‘smoking gun’ in the long search for the topological magnetic monopole referred to as the Berry curvature. This discovery is a breakthrough in the …

Tools of the Trade: Iolanda Di Bernardo explains XPS depth profiling for Nature series

X- ray photoelectron spectroscopy (XPS) is used for material characterization, providing quantitative information on the chemical composition of materials by identifying the type of elements that are present (nowadays, with a detection limit in the range of one part per thousand). XPS also allows the identification of the chemical state of the elements – such as the types of bonds …

Electrons on the edge: Atomically-thin quantum spin Hall materials

An exotic class of topological quantum materials has been reviewed by an international team of physicists, led by A/Prof Bent Weber at Nanyang Technological University (NTU – Singapore). Atomically-thin quantum spin Hall insulators, whose electronic states are protected by topology, promise applications in quantum information processing. Quantum spin Hall insulators are a class of two-dimensional (2D) topological states of matter …

Tools of the Trade: Eli Estrecho explains laser trapping for Nature series

A ‘pumped’ laser can be used to trap and manipulate an exciton-polariton condensate. These quantum fluids, which can behave as a resistanceless superfluid in certain conditions, need continuous replenishing, with the pumping laser supplying both a reservoir of electrons and confining force. “The pumping laser can trap the quantum fluid as the particles are repelled from the pump region, similarly …

Explainer: Linkage funding for topological-thermoelectricity

A team led by FLEET CI Prof Xiaolin Wang (University of Wollongong) has won a linkage project for topological materials based thermoelectricity. Thermoelectricity can directly convert heat to electrical energy or vice-versa. It plays an important role in renewable and sustainable energy by harvesting waste heat, which is widely available in human body, computer chips, sunlight and steel industry. Thermoelectric …

Tools of the Trade: Zengji Yue explains ion intercalation for new Nature series

Inserting ions into, or between, atomically-thin materials can be used to alter their properties in a finely-controlled fashion. For example, graphene’s properties can be fine-tuned by injection of another material (a process known as ‘intercalation’) either underneath the graphene, or between two graphene sheets. (See article.) “Intercalating ions into layered materials increases the spacing and decreases the coupling between the …

Sloshing quantum fluids of light and matter to probe superfluidity

The ‘sloshing’ of a quantum fluid comprised of light and matter reveals superfluid properties. An Australian-led team of physicists have successfully created sloshing quantum liquids in a ‘bucket’ formed by containment lasers. “These quantum fluids are expected to be as wavy as the oceans, but catching clear pictures of the waves is an experimental challenge,” says lead author Dr Eliezer …

Harnessing socially-distant molecular interactions for future computing

Could long-distance interactions between individual molecules forge a new way to compute? Interactions between individual molecules on a metal surface extend for surprisingly large distances – up to several nanometers. A new study, just published, of the changing shape of electronic states induced by these interactions, has potential future application in the use of molecules as individually addressable units. For …

Celebrating women in STEM

Why would we need a special day to celebrate women in science? February 11th marks the International Day of Women and Girls in Science, promoted by the United Nations. According to the UN, less than 30% of the researchers worldwide are women. This means that there’s twice as many men as there are women! In fields like Mathematics, Physics and …

Hosting scientific meetings in 2020 (ICSCE10)

In January 2020 FLEET brought the 10th International Conference on Spontaneous Coherence in Excitonic Systems (ICSCE10) to Australia for the first time. Continuing this 15-year tradition from the global scientific community interested in various quantum phenomena, ICSCE10 was hosted at the Arts Centre Melbourne amidst smoke storms resulting from one of the worst bushfire seasons in Australia’s history. ICSCE10 brought …

Liquid metals come to the rescue of semiconductors

Moore’s law is an empirical suggestion describing that the number of transistors doubles every few years in integrated circuits (ICs). However, Moore’s law has started to fail as transistors are now so small that the current silicon-based technologies are unable to offer further opportunities for shrinking. One possibility of overcoming Moore’s law is to resort to two-dimensional semiconductors.  These two-dimensional materials …

To kill a quasiparticle: a quantum whodunit

What causes quasiparticle death? In large systems of interacting particles in quantum mechanics, an intriguing phenomenon often emerges: groups of particles begin to behave like single particles. Physicists refer to such groups of particles as quasiparticles. Understanding the properties of quasiparticles may be key to comprehending, and eventually controlling, technologically important quantum effects like superconductivity and superfluidity. Unfortunately, quasiparticles are …

Growing metallic crystals in a liquid-metal solvent

Imagine an alien world with oceans of liquid metal. If such a world exists, metallic elements are likely the sources of the dissolved materials and particles in these oceans. Everything would be made of metallic elements, even lifeforms. It may sound like a concept pulled straight out of a science fiction movie, but some basic elements of this fantastical vision …

Vortex top-hats emerge in superfluids

An Australian-led study has provided new insight into the behaviour of rotating superfluids. A defining feature of superfluids is that they exhibit quantised vortices – they can only rotate with one, or two, or another integer amount of rotation. Despite this key difference from classical fluids, where vortices can spin with any strength, many features of the collective dynamics of …

Unexpectedly-fast conduction electrons in Na3Bi

—Written by Dr Iolanda di Bernardo, FLEET/Monash An Australian-led study uses a scanning-tunnelling microscope ‘trick’ to map electronic structure in Na3Bi, seeking an answer to that material’s extremely high electron mobility. In studying the topological Dirac semimetal, the team found that exchange and correlation effects are crucial to electron speed, and therefore mobility, and thus to the use of this …

Bingeing Netflix under lockdown? Here’s why streaming comes at a cost to the environment

Coronavirus lockdowns have led to a massive reduction in global emissions, but there’s one area where energy usage is up – way up – during the pandemic: internet traffic. Data-intensive video streaming, gaming and livestreaming for business, university and school classes, is chewing up energy. Read more: Netflix has capitalized on social isolation, but will its success continue in a post-coronavirus world? Estimates can be notoriously difficult and depend on the electricity …

Through the nanoscale looking glass:  FLEET researchers determine boson peak frequency in ultra-thin alumina

There’s more to glass than meets the eye. Glasses, which are disordered materials with no long-range chemical order, have some mysterious properties that have remained enigmatic for several decades. Amongst these are the anomalous vibrational states that contribute to the heat capacity at low temperature. Early researchers established that these states obey Bose-Einstein statistics, and the name stuck, so today …

Applying ‘magic angle’ twistronics to manipulate the flow of light

‘Twisted’ layers of 2D materials produce photonic topological transition at ‘magic’ rotation angles Principles of Moire-pattern bilayer graphene applied to 2D material photonics for first time Monash researchers are part of an international collaboration applying ‘twistronics’ concepts (the science of layering and twisting 2D materials to control their electrical properties) to manipulate the flow of light in extreme ways. The …

Liquid metals break down organic fuels into ultra-thin graphitic sheets

For the first time, FLEET researchers at UNSW, Sydney show the synthesis of ultra-thin graphitic materials at room temperature using organic fuels (which can be as simple as basic alcohols such as ethanol). Graphitic materials, such as graphene, are ultra-thin sheets of carbon compounds that are sought after materials with great promises for battery storage, solar cells, touch panels and …

Hosting Materials Australia at UNSW

—by Cecilia Bloise, Node Coordinator, UNSW Materials Australia members were hosted on a tour of FLEET’s labs at UNSW in February. FLEET is an ARC Centre of Excellence researching novel materials for ultra-low energy electronics. FLEET represents over a hundred physicists and materials scientists working to develop a new generation of electronics to address the challenge of energy used in information …

Taste of research: UNSW

UNSW’s Taste of Research program provides undergraduate Physics students the opportunity to undertake a small research project with one of the research groups in the School. Cecilia Bloise asked students Seamus Lilley and Krittika Kumar  who worked with FLEET PhD Yonatan Ashlea Alava, to describe the experience for our research blog…   What are you working on Seamus? “I worked …

Mind the gap: FLEET team from Wollongong and Monash reveal a wide-band gap topological insulator

Since their discovery in 2006, topological insulators have been widely discussed as a promising avenue for energy efficient electronics. Their unique high mobility edge states have a form of “quantum armour” that protects them from electron-scattering events that would otherwise produce waste heat. Unfortunately, practical applications of topological insulators have been severely limited by the small electronic bandgaps in most …

Discovery of ‘super-fluid like’ effect of penetration through porous materials in Liquid metals at room temperature

Researchers from the University of Wollongong, Australia have made the startling discovery that room-temperature liquid metals show a “superfluid-like” effect – passing through porous materials. The effect is made possible through the reduction of surface tension to a near-zero state by applying a voltage on the liquid metal in a solution. Their findings offer new opportunities for microfluidic applications and …

FLEET/UNSW scientists sharing their passion for science: Science outreach in August

—by Cecilia Bloise, Node Coordinator, UNSW There’s nothing like a strong dosage of outreach to get the ‘cats out of the box’ into the public sphere. The FLEET Centre of Excellence invests significant resources into science-outreach, aimed to inspire stronger engagement with science across all levels of the community, from primary and secondary school students to the broader population. Beyond …

Impossibly cool: Negative absolute temperatures

—by Dr Shaun Johnstone (Monash University) and Dr Tapio Simula (Swinburne University of Technology) One of the first things we learn about the absolute temperature scale, measured in degrees Kelvin, is that it’s impossible to get temperatures below Absolute Zero. But in a recent pair of FLEET studies into turbulence, researchers were working in a regime of precisely that: negative …

Lindau report

Three FLEET ECRs were fortunate to attend the 69th Nobel laureate meeting in Lindau, Germany, forming an impressive 30% of Australia’s ten-person delegation elected and led by the Australian Academy of Science. This year’s meeting focused on physics, and a number of senior FLEET were amongst the laureates. Our ECRs were pleased to connect with Wolfgang Ketterle, William Phillips, and …