Transport and optical measurement on twisted homo-bilayer WSe 2 /WSe 2 structure
Bulletin of the American Physical Society(2019)
摘要
The freedom of stacking different layers of 2D van der Waals (vdW) materials with an arbitrary twist angle opens up tremendous opportunities in studying emergent properties that are not accessible in the natural crystal form. In particular, recent measurements on magic-angle twisted bilayer graphene device show strongly correlated electronic properties, including correlated insulating behavior and unconventional superconductivity due to the formation of flat bands. Flat bands are expected in other small twist angle systems, including twisted bilayer transition-metal dichalcogenide (TMD), which could lead to new transport and optical properties. In this work, we fabricated encapsulated and dual-gated twisted homo-bilayer WSe 2/WSe 2 devices with precise angle control. We studied their electronic and optical properties as a function of charge density, electric/magnetic field, and temperature with an aim to …
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