@article{BurgosAtencia2024,

title = {Orbital angular momentum of Bloch electrons: equilibrium formulation, magneto-electric phenomena, and the orbital Hall effect},

author = {Rhonald Burgos Atencia and Amit Agarwal and Dimitrie Culcer},

doi = {10.1080/23746149.2024.2371972},

issn = {2374-6149},

year  = {2024},

date = {2024-12-31},

journal = {Advances in Physics: X},

volume = {9},

number = {1},

publisher = {Informa UK Limited},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Sortino2024,

title = {Optically addressable spin defects coupled to bound states in the continuum metasurfaces},

author = {Luca Sortino and Angus Gale and Lucca Kühner and Chi Li and Jonas Biechteler and Fedja J. Wendisch and Mehran Kianinia and Haoran Ren and Milos Toth and Stefan A. Maier and Igor Aharonovich and Andreas Tittl},

doi = {10.1038/s41467-024-46272-1},

issn = {2041-1723},

year  = {2024},

date = {2024-12-00},

journal = {Nat Commun},

volume = {15},

number = {1},

publisher = {Springer Science and Business Media LLC},

abstract = {AbstractVan der Waals (vdW) materials, including hexagonal boron nitride (hBN), are layered crystalline solids with appealing properties for investigating light-matter interactions at the nanoscale. hBN has emerged as a versatile building block for nanophotonic structures, and the recent identification of native optically addressable spin defects has opened up exciting possibilities in quantum technologies. However, these defects exhibit relatively low quantum efficiencies and a broad emission spectrum, limiting potential applications. Optical metasurfaces present a novel approach to boost light emission efficiency, offering remarkable control over light-matter coupling at the sub-wavelength regime. Here, we propose and realise a monolithic scalable integration between intrinsic spin defects in hBN metasurfaces and high quality (Q) factor resonances, exceeding 102, leveraging quasi-bound states in the continuum (qBICs). Coupling between defect ensembles and qBIC resonances delivers a 25-fold increase in photoluminescence intensity, accompanied by spectral narrowing to below 4 nm linewidth and increased narrowband spin-readout efficiency. Our findings demonstrate a new class of metasurfaces for spin-defect-based technologies and pave the way towards vdW-based nanophotonic devices with enhanced efficiency and sensitivity for quantum applications in imaging, sensing, and light emission.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Lowe2024,

title = {Local gate control of Mott metal-insulator transition in a 2D metal-organic framework},

author = {Ben J. Powell and B. Field and J. Hellerstedt and J. Ceddia and H. L. Nourse and B. J. Powell and N. V. Medhekar and A. Schiffrin},

doi = {10.1038/s41467-024-47766-8},

issn = {2041-1723},

year  = {2024},

date = {2024-12-00},

urldate = {2024-12-00},

journal = {Nat Commun},

volume = {15},

number = {1},

publisher = {Springer Science and Business Media LLC},

abstract = {<jats:title>Abstract</jats:title><jats:p>Electron-electron interactions in materials lead to exotic many-body quantum phenomena, including Mott metal-insulator transitions (MITs), magnetism, quantum spin liquids, and superconductivity. These phases depend on electronic band occupation and can be controlled via the chemical potential. Flat bands in two-dimensional (2D) and layered materials with a kagome lattice enhance electronic correlations. Although theoretically predicted, correlated-electron Mott insulating phases in monolayer 2D metal-organic frameworks (MOFs) with a kagome structure have not yet been realised experimentally. Here, we synthesise a 2D kagome MOF on a 2D insulator. Scanning tunnelling microscopy (STM) and spectroscopy reveal a MOF electronic energy gap of ∼200 meV, consistent with dynamical mean-field theory predictions of a Mott insulator. Combining template-induced (via work function variations of the substrate) and STM probe-induced gating, we locally tune the electron population of the MOF kagome bands and induce Mott MITs. These findings enable technologies based on electrostatic control of many-body quantum phases in 2D MOFs.</jats:p>},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Yang2024,

title = {Steep-slope vertical-transport transistors built from sub-5 nm Thin van der Waals heterostructures},

author = {Qiyu Yang and Zheng-Dong Luo and Huali Duan and Xuetao Gan and Dawei Zhang and Yuewen Li and Dongxin Tan and Jan Seidel and Wenchao Chen and Yan Liu and Yue Hao and Genquan Han},

doi = {10.1038/s41467-024-45482-x},

issn = {2041-1723},

year  = {2024},

date = {2024-12-00},

journal = {Nat Commun},

volume = {15},

number = {1},

publisher = {Springer Science and Business Media LLC},

abstract = {AbstractTwo-dimensional (2D) semiconductor-based vertical-transport field-effect transistors (VTFETs) – in which the current flows perpendicularly to the substrate surface direction – are in the drive to surmount the stringent downscaling constraints faced by the conventional planar FETs. However, low-power device operation with a sub-60 mV/dec subthreshold swing (SS) at room temperature along with an ultra-scaled channel length remains challenging for 2D semiconductor-based VTFETs. Here, we report steep-slope VTFETs that combine a gate-controllable van der Waals heterojunction and a metal-filamentary threshold switch (TS), featuring a vertical transport channel thinner than 5 nm and sub-thermionic turn-on characteristics. The integrated TS-VTFETs were realised with efficient current switching behaviours, exhibiting a current modulation ratio exceeding 1 × 108 and an average sub-60 mV/dec SS over 6 decades of drain current. The proposed TS-VTFETs with excellent area- and energy-efficiency could help to tackle the performance degradation-device downscaling dilemma faced by logic transistor technologies.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Prokhorenko2024,

title = {Motion and teleportation of polar bubbles in low-dimensional ferroelectrics},

author = {S. Prokhorenko and Y. Nahas and V. Govinden and Q. Zhang and N. Valanoor and L. Bellaiche},

doi = {10.1038/s41467-023-44639-4},

issn = {2041-1723},

year  = {2024},

date = {2024-12-00},

journal = {Nat Commun},

volume = {15},

number = {1},

publisher = {Springer Science and Business Media LLC},

abstract = {AbstractElectric bubbles are sub-10nm spherical vortices of electric dipoles that can spontaneously form in ultra-thin ferroelectrics. While the static properties of electric bubbles are well established, little to nothing is known about the dynamics of these particle-like structures. Here, we reveal pathways to realizing both the spontaneous and controlled dynamics of electric bubbles in ultra-thin Pb(Zr0.4Ti0.6)O3 films. In low screening conditions, we find that electric bubbles exhibit thermally-driven chaotic motion giving rise to a liquid-like state. In the high screening regime, we show that bubbles remain static but can be continuously displaced by a local electric field. Additionally, we predict and experimentally demonstrate the possibility of bubble teleportation - a process wherein a bubble is transferred to a new location via a single electric field pulse of a PFM tip. Finally, we attribute the discovered phenomena to the hierarchical structure of the energy landscape.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Li2024,

title = {Recent progress of MnBi_{2}Te_{4} epitaxial thin films as a platform for realising the quantum anomalous Hall effect},

author = {Qile Li and Sung-Kwan Mo and Mark T. Edmonds},

doi = {10.1039/d4nr00194j},

issn = {2040-3372},

year  = {2024},

date = {2024-08-07},

journal = {Nanoscale},

volume = {16},

number = {30},

pages = {14247--14260},

publisher = {Royal Society of Chemistry (RSC)},

abstract = {This mini-review summarises recent discoveries on MnBi2Te4 thin films and provides insights for overcoming the temperature barrier for the quantum anomalous Hall effect.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Xu2024,

title = {Electronic Properties of W’ Twin Walls in Ferroelastic BiVO_{4}},

author = {Yuwen Xu and Pankaj Sharma and Haotian Wen and Dawei Zhang and Charlie Kong and Zewu Yan and Shery L. Y. Chang and Jan Seidel},

doi = {10.1002/adfm.202400420},

issn = {1616-3028},

year  = {2024},

date = {2024-08-00},

journal = {Adv Funct Materials},

volume = {34},

number = {33},

publisher = {Wiley},

abstract = {AbstractTopological defects in ferroic materials can exhibit intrinsic properties that differ from the bulk. Here， structural and electronic variations of non‐prominent (W’) ferroelastic twin domain walls are investigated in BiVO4, a widely investigated photocatalytic material. Using aberration‐corrected scanning transmission electron microscopy (STEM), a kink configuration of the sharp ferroelastic twin wall with an altered electronic structure is revealed. Nanoscale conductivity measurements by conductive atomic force microscopy (c‐AFM) show higher conductivity at twin walls compared to non‐conductive bulk domains. Electronic structure investigation by electron energy loss spectroscopy (EELS) shows a higher density of oxygen vacancies and possible polaron accumulation at the wall. These findings reveal the electronic properties of BiVO4 domain walls, which are interesting for nanoscale‐engineered catalytic concepts of BiVO4 and materials design for photochemistry‐relevant applications.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Nadeem2024,

title = {Spin Gapless Quantum Materials and Devices},

author = {Muhammad Nadeem and Xiaolin Wang},

doi = {10.1002/adma.202402503},

issn = {1521-4095},

year  = {2024},

date = {2024-08-00},

journal = {Advanced Materials},

volume = {36},

number = {33},

publisher = {Wiley},

abstract = {AbstractQuantum materials, with nontrivial quantum phenomena and mechanisms, promise efficient quantum technologies with enhanced functionalities. Quantum technology is held back because a gap between fundamental science and its implementation is not fully understood yet. In order to capitalize the quantum advantage, a new perspective is required to figure out and close this gap. In this review, spin gapless quantum materials, featured by fully spin‐polarized bands and the electron/hole transport, are discussed from the perspective of fundamental understanding and device applications. Spin gapless quantum materials can be simulated by minimal two‐band models and could help to understand band structure engineering in various topological quantum materials discovered so far. It is explicitly highlighted that various types of spin gapless band dispersion are fundamental ingredients to understand quantum anomalous Hall effect. Based on conventional transport in the bulk and topological transport on the boundaries, various spintronic device aspects of spin gapless quantum materials as well as their advantages in different models for topological field effect transistors are reviewed.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{He2023,

title = {Controllable Flow and Manipulation of Liquid Metals},

author = {Yahua He and Jing You and Michael D. Dickey and Xiaolin Wang},

doi = {10.1002/adfm.202309614},

issn = {1616-3028},

year  = {2024},

date = {2024-08-00},

journal = {Adv Funct Materials},

volume = {34},

number = {31},

publisher = {Wiley},

abstract = {AbstractThis review summarizes the controllable flow and manipulation of gallium‐based liquid metals (e.g., eutectic gallium indium, EGaIn). There are generally only a few ways to handle fluids, but liquid metals offer versatile control due to their properties: 1) excellent fluidity, 2) adjustable surface tension, 3) electrically and chemically controllable surface oxides, 4) metallic electrical and thermal conductivity, and 5) the ability to alloy with other metals (e.g., magnetic particles). These all‐in‐one properties empower liquid metals to exhibit controllable flow in confined microchannels (steerable flow) and from nozzles (printable flow), and make liquid metals susceptible to various energy fields, including electric, magnetic, electromagnetic, wave, and light fields. Consequently, the flow and manipulation of liquid metals enable intriguing morphological changes (e.g., formation of droplets/plugs, jets, fibers) and controllable motion (e.g., jumping, bouncing, directional locomotion, rotation) of liquid metals with new fluidic phenomena and practical applications such as soft electronics and robotics. This review aims to present a selective framework and provide an insightful understanding for controlling and shaping liquid metals, thereby stimulating further research and generating increased interest in this topic.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Parker2023,

title = {Synthesis of Planet‐Like Liquid Metal Nanodroplets with Promising Properties for Catalysis},

author = {Caiden J. Parker and Vaishnavi Krishnamurthi and Karma Zuraiqi and Chung Kim Nguyen and Mehmood Irfan and Fahad Jabbar and Dan Yang and Mew P. Aukarasereenont and Edwin L. H. Mayes and Billy J. Murdoch and Aaron Elbourne and Ken Chiang and Torben Daeneke},

doi = {10.1002/adfm.202304248},

issn = {1616-3028},

year  = {2024},

date = {2024-08-00},

journal = {Adv Funct Materials},

volume = {34},

number = {31},

publisher = {Wiley},

abstract = {AbstractLiquid metal nanodroplets are an emerging class of underexplored materials with significant potential in many applications, including catalysis, bio‐therapeutics, and phase‐change materials. These nanostructures are generally synthesized by mechanical agitation via ultrasonication of low‐melting metals like Ga. Once these materials are successfully synthesized, they can be suspended in a vast array of different solvents. However, one major issue arises specifically with liquid metal alloys which are found to de‐alloy in the sonication process. Here, it is demonstrated that this challenge can be overcome by undertaking sonication at high temperatures, suspending nanodroplets within molten sodium acetate (NaOAc). After cooling, the nanostructures become planet‐like nanodroplets which are covered by an interfacial oxide crust, feature a liquid metal mantle, and a solid core. The molten salt solvent can effectively be removed rendering this approach to be ideal, especially for catalysts. The proof‐of‐concept application is demonstrated by carrying out electrocatalytic ethanol oxidation, using the Cu–Ga system. The superior performance of the Cu–Ga nanodroplets highlights potential in catalyzing a vast array of reactions. Aside from the Cu–Ga system, this facile process can be applied to multiple other systems, including Ag–Ga, Zn–Ga, Bi–Ga, In–Cu, and Sn–Cu.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Yu2023,

title = {Impact of Minor Alloy Components on the Electrocapillarity and Electrochemistry of Liquid Metal Fractals},

author = {Ruohan Yu and Jialuo Han and Yuan Chi and Jiewei Zheng and Richard Fuchs and Mohammad B. Ghasemian and Md. Arifur Rahim and Shi‐Yang Tang and Guangzhao Mao and Kourosh Kalantar‐Zadeh and Jianbo Tang},

doi = {10.1002/adfm.202301348},

issn = {1616-3028},

year  = {2024},

date = {2024-08-00},

journal = {Adv Funct Materials},

volume = {34},

number = {31},

publisher = {Wiley},

abstract = {AbstractExploring and controlling surface tension‐driven phenomena in liquid metals may lead to unprecedented possibilities for next‐generation microfluidics, electronics, catalysis, and materials synthesis. In pursuit of these goals, the impact of minor constituents within liquid alloys is largely overlooked. Herein, it is showed that the presence of a fraction of solute metals such as tin, bismuth, and zinc in liquid gallium can significantly influence their electrocapillarity and electrochemistry. The instability‐driven fractal formation of liquid alloy droplets is investigated with different solutes and reveals the formation of distinctive non‐branched droplets, unstable fractals, and stable fractal modes under controlled voltage and alkaline solution conditions. In their individually unique fractal morphology diagrams, different liquid alloys demonstrate significantly shifted voltage thresholds in transition between the three fractal modes, depending on the choice of the solute metal. Surface tension measurements, cycle voltammetry and surface compositional characterizations provide strong evidence that the minor alloy components drastically alter the surface tension, surface electrochemical oxidation, and oxide dissolution processes that govern the droplet deformation and instability dynamics. The findings that minor components are able to regulate liquid alloys’ surface tensions, surface element distributions and electrochemical activities offer great promises for harnessing the tunability and functionality of liquid metals.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Zheng2023,

title = {Dynamic Zinc in Liquid Metal Media as a Metal Ion Source for Highly Porous ZIF‐8 Synthesis},

author = {Jiewei Zheng and Astha Sharma and Tushar Kumeria and Yuan Chi and Mohammad B. Ghasemian and Guangzhao Mao and Jianbo Tang and Priyank Kumar and Md. Arifur Rahim and Kourosh Kalantar‐Zadeh},

doi = {10.1002/adfm.202300969},

issn = {1616-3028},

year  = {2024},

date = {2024-08-00},

journal = {Adv Funct Materials},

volume = {34},

number = {31},

publisher = {Wiley},

abstract = {AbstractLiquid metals provide new dimensions for controlling and governing of reactions. The concept of freely moving metal solutes in liquid metals can be potentially used for enhancing and tuning interfacial reactions. In this work, zinc (Zn), as the solute metal is shown that, can move to the interface, enriching the interfacial area for the efficient synthesis of highly crystalline and porous zeolitic imidazolate framework‐8 (ZIF‐8). The highest rate of reaction is illustrated, and the best quality ZIF‐8, are obtained when a eutectic liquid metal system of Zn with gallium (Ga), containing 3.6 wt.% of Zn, is implemented. It is computationally shown that a combination of Ga activation and freely moving Zn leads to the highest reaction rate and better coordination with organic linkers. The comparisons with solid samples and non‐eutectic systems of Ga liquid demonstrate the advantages of eutectic mix. The work can be expanded to a variety of future interfacial reactions of zeolite imidazole frameworks for commercial scale up.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Liu2024,

title = {Exploring unconventional ferromagnetism in hole-doped LaCrAsO: insights into charge-transfer and magnetic interactions},

author = {Zhao Liu and Nikhil V. Medhekar},

doi = {10.1039/d4nr01433b},

issn = {2040-3372},

year  = {2024},

date = {2024-07-18},

journal = {Nanoscale},

volume = {16},

number = {28},

pages = {13483--13491},

publisher = {Royal Society of Chemistry (RSC)},

abstract = {Canonical double exchange mechanism at low doping, new mechanism at high doping.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Sakamoto2024,

title = {Structural and Chemical Insights into Designer Defects in Tetragonal-like Epitaxial BiFeO_{3} Thin Films},

author = {Yasuhiro Sakamoto and John E. Daniels and Nagarajan Valanoor and Shery L. Y. Chang and Daniel Sando},

doi = {10.1021/acs.jpcc.4c02744},

issn = {1932-7455},

year  = {2024},

date = {2024-07-11},

journal = {J. Phys. Chem. C},

volume = {128},

number = {27},

pages = {11401--11409},

publisher = {American Chemical Society (ACS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Atencia2024,

title = {Intrinsic torque on the orbital angular momentum in an electric field},

author = {Rhonald Burgos Atencia and Daniel P. Arovas and Dimitrie Culcer},

doi = {10.1103/physrevb.110.035427},

issn = {2469-9969},

year  = {2024},

date = {2024-07-00},

journal = {Phys. Rev. B},

volume = {110},

number = {3},

publisher = {American Physical Society (APS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Finnigan2024,

title = {Giant resonant skew scattering of plasma waves in a two-dimensional electron gas},

author = {Cooper Finnigan and Dmitry K. Efimkin},

doi = {10.1103/physrevb.110.l041406},

issn = {2469-9969},

year  = {2024},

date = {2024-07-00},

journal = {Phys. Rev. B},

volume = {110},

number = {4},

publisher = {American Physical Society (APS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Maggiora2024,

title = {Superconductivity and interfaces},

author = {Joshua Maggiora and Xiaolin Wang and Rongkun Zheng},

doi = {10.1016/j.physrep.2024.05.001},

issn = {0370-1573},

year  = {2024},

date = {2024-07-00},

journal = {Physics Reports},

volume = {1076},

pages = {1--49},

publisher = {Elsevier BV},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Parker2024,

title = {Spontaneous Liquefaction of Solid Metal–Liquid Metal Interfaces in Colloidal Binary Alloys},

author = {Caiden J. Parker and Karma Zuraiqi and Vaishnavi Krishnamurthi and Edwin LH Mayes and Pierre H. A. Vaillant and Syeda Saba Fatima and Karolina Matuszek and Jianbo Tang and Kourosh Kalantar‐Zadeh and Nastaran Meftahi and Chris F. McConville and Aaron Elbourne and Salvy P. Russo and Andrew J. Christofferson and Ken Chiang and Torben Daeneke},

doi = {10.1002/advs.202400147},

issn = {2198-3844},

year  = {2024},

date = {2024-07-00},

journal = {Advanced Science},

volume = {11},

number = {26},

publisher = {Wiley},

abstract = {AbstractCrystallization of alloys from a molten state is a fundamental process underpinning metallurgy. Here the direct imaging of an intermetallic precipitation reaction at equilibrium in a liquid‐metal environment is demonstrated. It is shown that the outer layers of a solidified intermetallic are surprisingly unstable to the depths of several nanometers, fluctuating between a crystalline and a liquid state. This effect, referred to herein as crystal interface liquefaction, is observed at remarkably low temperatures and results in highly unstable crystal interfaces at temperatures exceeding 200 K below the bulk melting point of the solid. In general, any liquefaction process would occur at or close to the formal melting point of a solid, thus differentiating the observed liquefaction phenomenon from other processes such as surface pre‐melting or conventional bulk melting. Crystal interface liquefaction is observed in a variety of binary alloy systems and as such, the findings may impact the understanding of crystallization and solidification processes in metallic systems and alloys more generally.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Krishnamurthi2024b,

title = {Structural Evolution of Liquid Metals and Alloys},

author = {Vaishnavi Krishnamurthi and Pierre H. A. Vaillant and Jitendra Mata and Chung Kim Nguyen and Caiden J. Parker and Karma Zuraiqi and Gary Bryant and Ken Chiang and Salvy P. Russo and Andrew J. Christofferson and Aaron Elbourne and Torben Daeneke},

doi = {10.1002/adma.202403885},

issn = {1521-4095},

year  = {2024},

date = {2024-07-00},

journal = {Advanced Materials},

volume = {36},

number = {30},

publisher = {Wiley},

abstract = {AbstractLow‐melting liquid metals are emerging as a new group of highly functional solvents due to their capability to dissolve and alloy various metals in their elemental state to form solutions as well as colloidal systems. Furthermore, these liquid metals can facilitate and catalyze multiple unique chemical reactions. Despite the intriguing science behind liquid metals and alloys, very little is known about their fundamental structures in the nanometric regime. To bridge this gap, this work employs small angle neutron scattering and molecular dynamics simulations, revealing that the most commonly used liquid metal solvents, EGaIn and Galinstan, are surprisingly structured with the formation of clusters ranging from 157 to 15.7 Å. Conversely, noneutectic liquid metal alloys of GaSn or GaIn at low solute concentrations of 1, 2, and 5 wt%, as well as pure Ga, do not exhibit these structures. Importantly, the eutectic alloys retain their structure even at elevated temperatures of 60 and 90 °C, highlighting that they are not just simple homogeneous fluids consisting of individual atoms. Understanding the complex soft structure of liquid alloys will assist in comprehending complex phenomena occurring within these fluids and contribute to deriving reaction mechanisms in the realm of synthesis and liquid metal‐based catalysis.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Sushkov2024,

title = {Schiff moments of deformed nuclei},

author = {O. P. Sushkov},

doi = {10.1103/physrevc.110.015501},

issn = {2469-9993},

year  = {2024},

date = {2024-07-00},

journal = {Phys. Rev. C},

volume = {110},

number = {1},

publisher = {American Physical Society (APS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}