Yi-Hsun Chen, PhD Candidate, Monash University
Transition metal dichalcogenides (TMDs) have received lots of attention because of their attracting electronic properties. Here we present the fabrication processes and the electrical characterisation of atomically-thin tungsten diselenide field-effect transistors (WSe2 FET). In contrast to the conventional lithography, we made WSe2 FETs by integrating a standard dry transfer technique with pre-patterned multi-probe electrodes. The four-probe transport measurements enable us to extract the carrier mobility and the contact resistance of WSe2 FET. Our future work is to pursue high-performance WSe2 devices by reducing contact resistance, paving the way to study exciton superfluid in double 1L-TMDs heterostructures.
About the presenter
Yi-Hsun Chen is an experimental physicist working with Prof Michael Fuhrer and Dr Chen Shao-Yu at Monash University, where he researches Bose-Einstein condensates using devices constructed using 2D materials, seeking exciton superfluids in 2D material quantum wells.
His research falls under FLEET research theme 2 exciton superfluids. For his PhD project, he is using 2D materials to create double quantum wells separated by a thin insulating layer, a promising structure for producing long-life electron-hole pairs, called indirect excitons. Indirect excitons are able to form an exciton superfluid, which can generate dissipationless current flows.