Date of Graduation
Doctor of Philosophy in Physics (PhD)
Second Committee Member
Quantum Dots, TMDs, Transistion Metal Dichalcogenides, Tungsten Diselenide, WSe2
This work focuses on the investigation of single and double quantum dots in two-dimensional transition metal dichalcogenide tungsten diselenide (WSe_2) as a means to evaluate the valley degree of freedom as a potential qubit and ambipolar tungsten diselenide monolayers as single photon sources. Gate-defined quantum dots in monolayer and bilayer WSe_2 were fabricated and characterized. Single dot devices are gated from above and below the WSe_2 to accumulate a hole gas. Temperature dependence of Coulomb-blockade peak height is consistent with single-level transport. Excited-state transport in the quantum dot is shown for both monolayer and bilayer devices. Magnetic field dependence of the excited states in the bilayer devices provides a lower bound for g factors. Ambipolar monolayer WSe_2 is integrated into a double dot P-N junction device. Design considerations for double dot devices are discussed. Early measurements of double dot devices show features in the current possibly consistent with transport through double dots.
Stacy, J. A. (2022). Quantum Dots In Two-Dimensional Tungsten Diselenide. Graduate Theses and Dissertations Retrieved from https://scholarworks.uark.edu/etd/4599