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Landau levels offer a neat model system to study emergent quantum phases, owing to the dominating Coulomb interactions and tunable orbital wavefunctions. In atomically-thin transition metal dichalcogenide, the well-resolved and -controlled spin, valley and layer degree of freedom further enriches the physics that can be explored. In this talk, I’ll discuss a few examples in WSe2: first, a bilayer WSe2 allows selective carrier population of the individual layers; when the filling factor of the two layers is an integer number, it manifests as a natural platform for interlayer exciton condensate. Second, a large imbalance in the population of two (pseudo)spins gives rise to spin-dependent transport in partially filled Landau levels - the spin-minority carriers are much less mobile than the spin-majority carriers. We explain such behavior using a polaron picture.
Qianhui Shi got her PhD in physics from University of Minnesota in 2017, did postdoctoral research at University of Columbia, and joined the physics department of UCLA as an assistant professor in Nov 2021. Her research efforts have focused on electronic properties in two dimension systems.
Join Zoom Meeting:
https://cern.zoom.us/j/66236354793?wd=OXQyaDRnaExaRFJaaHZhRjRuNEpHQT09
Meeting ID: 662 3635 4793 Passcode: 238020