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Observation of the Quantum Spin Hall Effect up to 100 Kelvin in a Monolayer Crystal
Sanfeng Wu, Valla Fatemi, Quinn D. Gibson +4
The field of topological insulators (TI) was sparked by the prediction of the quantum spin Hall effect (QSHE) in time reversal invariant systems, such as spin-orbit coupled monolay…
Enhanced Superconductivity and Suppression of Charge-density Wave Order in 2H-TaS in the Two-dimensional Limit
Yafang Yang, Shiang Fang, Valla Fatemi +6
As superconductors are thinned down to the 2D limit, their critical temperature typically decreases. Here we report the opposite behavior, a substantial enhancement of …
Magnetoresistance and Quantum Oscillations of an Electrostatically Tuned Semimetal-to-Metal Transition in Ultra-Thin WTe2
Valla Fatemi, Quinn D. Gibson, Kenji Watanabe +3
We report on electronic transport measurements of electrostatically gated nano-devices of the semimetal WTe\textsubscript{2}. High mobility metallic behavior is achieved in the 2D…