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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.)

Macroscopic transverse drift of long current-induced spin coherence in two-dimensional electron gases

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Author(s):
Hernandez, F. G. G. [1] ; Ullah, S. [1] ; Ferreira, G. J. [2] ; Kawahala, N. M. [1] ; Gusev, G. M. [1] ; Bakarov, A. K. [3, 4]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, SP - Brazil
[2] Univ Fed Uberlandia, Inst Fis, BR-38400902 Uberlandia, MG - Brazil
[3] Novosibirsk State Univ, Novosibirsk 630090 - Russia
[4] Inst Semicond Phys, Novosibirsk 630090 - Russia
Total Affiliations: 4
Document type: Journal article
Source: Physical Review B; v. 94, n. 4 JUL 14 2016.
Web of Science Citations: 6
Abstract

We imaged the transport of current-induced spin coherence in a two-dimensional electron gas confined in a triple quantum well. Nonlocal Kerr rotation measurements, based on the optical resonant amplification of the electrically-induced polarization, revealed a large spatial variation of the electron g factor and the efficient generation of a current-controlled spin-orbit field in a macroscopic Hall bar device. We observed coherence times in the nanoseconds range transported beyond half-millimeter distances in a direction transverse to the applied electric field. The measured long spin transport length can be explained by two material properties: large mean free path for charge diffusion in clean systems and enhanced spin-orbit coefficients in the triple well. (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