Spin and Valley Filter Based on Two-Dimensional WSe_2 Heterostructures
Dr. David Zambrano, USM.

Abstract:
In this work, we investigate the spin and valley transport properties of a WSe_2 monolayer placed on top of a ferromagnetic insulator. We are interested in controlling the transport properties by applying external potentials to the system. To obtain spin and valley polarizations, we consider a single- and a double- barrier structure with gate potentials. We analyze how the efficiency of these polarized transport properties depends on the gate-potential intensities and geometrical configurations. Additionally, we investigate how the spin and valley transport properties are modified when an ac potential is applied to the system. We obtain a controllable modulation of the spin and valley polarizations as a function of the intensity and frequency of the ac potential, mainly in the terahertz range. These results validate the proposal of double quantum well structures of WSe_2 as candidates to provide spin- and valley-dependent transport within an optimal geometrical parameter regime.

Miércoles 16 de junio, 16:00 hrs.

Link a reunión de Zoom;
https://us02web.zoom.us/j/93451978812?pwd=VkhZY0hIb1RjNzgvU01WK2oxQVYzdz09
ID de reunión: 934 5197 8812
Código de acceso: 098839

Seminario Dr. D. Zambrano 16 junio