| Full text | |
| 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, p. 6-pg., 2017-06-30. |
| 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 Opportunities: | Regular Research Grants |
| FAPESP's process: | 16/50018-1 - Spin noise in two-dimensional electron gases |
| Grantee: | Felix Guillermo Gonzalez Hernandez |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 09/15007-5 - Magnetic dynamics in semiconductor nanocrystals |
| Grantee: | Felix Guillermo Gonzalez Hernandez |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 13/03450-7 - The spin Hall effect in semiconductors |
| Grantee: | Felix Guillermo Gonzalez Hernandez |
| Support Opportunities: | 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 Opportunities: | Research Projects - Thematic Grants |