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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Gate control of the spin mobility through the modification of the spin-orbit interaction in two-dimensional systems

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Author(s):
Luengo-Kovac, M. ; Moraes, F. C. D. ; Ferreira, G. J. ; Ribeiro, A. S. L. ; Gusev, G. M. ; Bakarov, A. K. ; Sih, V. ; Hernandez, F. G. G.
Total Authors: 8
Document type: Journal article
Source: Physical Review B; v. 95, n. 24 JUN 30 2017.
Web of Science Citations: 3
Abstract

Spin drag measurements were performed in a two-dimensional electron system set close to the crossed spin helix regime and coupled by strong intersubband scattering. In a sample with an uncommon combination of long spin lifetime and high charge mobility, the drift transport allows us to determine the spin-orbit field and the spin mobility anisotropies. We used a random walk model to describe the system dynamics and found excellent agreement for the Rashba and Dresselhaus couplings. The proposed two-subband system displays a large tuning lever arm for the Rashba constant with gate voltage, which provides a new path towards a spin transistor. Furthermore, the data show large spin mobility controlled by the spin-orbit constants setting the field along the direction perpendicular to the drift velocity. This work directly reveals the resistance experienced in the transport of a spin-polarized packet as a function of the strength of anisotropic spin-orbit fields. (AU)

FAPESP's process: 14/25981-7 - Generating and mapping spin currents with space and time resolution
Grantee:Felix Guillermo Gonzalez Hernandez
Support type: Regular Research Grants
FAPESP's process: 15/16191-5 - The research in new materials involving high magnetic fields and low temperatures
Grantee:Gennady Gusev
Support type: Research Projects - Thematic Grants
FAPESP's process: 09/15007-5 - Magnetic dynamics in semiconductor nanocrystals
Grantee:Felix Guillermo Gonzalez Hernandez
Support type: Regular Research Grants
FAPESP's process: 13/03450-7 - The spin Hall effect in semiconductors
Grantee:Felix Guillermo Gonzalez Hernandez
Support type: Regular Research Grants