October 2, 2020 at 3:15 pm

NQPI Seminar | Gate-defined Quantum Dots in Monolayer and Bilayer WSe2, Nov. 5

Hugh Churchill, portrait

Dr. Hugh Churchill

The Nanoscale & Quantum Phenomena Institute Seminar series presents Dr. Hugh Churchill  discussing “Gate-defined Quantum Dots in Monolayer and Bilayer WSe2” on Nov. 5 at 4:10 p.m.

Churchill is Assistant Professor of Physics at the University of Arkansas.

For virtual meeting information, contact the host, Dr. Nancy Sandler.

Abstract: I will discuss our work to fabricate and characterize gate-defined, accumulation mode quantum dots using monolayer and bilayer WSe2.  The devices are operated with gates above and below the WSe2 layer to accumulate a hole gas, which for some devices is then selectively depleted to define the dot. Temperature dependence of conductance in the Coulomb-blockade regime is consistent with transport through a single level, and excited-state transport through the dots is observed at temperatures up to 10 K. These devices provide a platform to evaluate valley-spin states in monolayer and bilayer WSe2 for application as qubits.  Finally, I will discuss some of the new experiments made possible by these devices.


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