Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session B12: Ballistic Transport in Semiconductor Devices
11:30 AM–2:06 PM,
Monday, March 14, 2022
Room: McCormick Place W-181C
Sponsoring
Unit:
FIAP
Chair: Giti Khodaparast, FIAP
Abstract: B12.00011 : Spin and Valley Filter Based on Two-Dimensional WSe2 Heterostructures*
1:30 PM–1:42 PM
Presenter:
Luis Rosales
(Departamento de Física, Universidad T. Federico Santa Maria)
Authors:
Luis Rosales
(Departamento de Física, Universidad T. Federico Santa Maria)
David Zambrano
(Federico Santa Maria Technical University)
Pedro A Orellana
(DEpartamento de Física, Universidad T, Federico Santa Maria)
Andrea B Latgé
(Instituto de Fisica, Universidad Federal Flumninense)
Collaboration:
D. Zambrano , P. A. Orellana, L. Rosales and A. Latgé
This allows a convenient scenario for obtaining the tuning processes. Moreover, due to the versatility of being either positive or negative valued, this description opens up the possibility of tuning the valley splitting sign and magnitude together. Furthermore, we analyze the possibility of promoting valley and spin polarization inversions on TMDC layers under the effects of time-dependent external potentials, such as time-oscillating gate voltages or laser irradiation. Different mechanisms are analyzed to synchronize the physical parameters of the proposed system, such as the Fermi energy, the frequency and amplitude of the time-dependent potential, and the external gate voltages, to optimize the time-dependent transport properties, such as the induced switching effects of the transport of the systems.
These results validate the proposal of double quantum well structures of WSe2 as candidates to provide spin- and valley-dependent transport within an optimal geometrical parameter regime.
*This work was partially financed by the Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT) of Chile, under Grants No. 1180914 and No. 1201876. A.L. would like to acknowledge partial support from the Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ) (Grant No. E-26/202.567/2019), the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), and the Instituto Nacional de Ciência e Tecnologia (INCT) em Nanomateriais de Carbono.
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