Physics – Condensed Matter – Materials Science
Scientific paper
2011-08-09
Physics
Condensed Matter
Materials Science
5 pages, 3 figures
Scientific paper
We consider stationary spin current in a (110)-oriented GaAs-based symmetric quantum well due to a nonlinear response to an external periodic electric field. The model assumed includes the Dresselhaus spin-orbit interaction and the random Rashba spin-orbit coupling. The Dresselhaus term is uniform in the quantum well plane and gives rise to spin splitting of the electron band. The external electric field of frequency $\omega$ - in the presence of random Rashba coupling -- leads to virtual spin-flip transitions between spin subbands, generating stationary pure spin current proportional to the square of the field amplitude.
Barnas Jozef
Dugaev Vitalii K.
Ivanov V. I.
Sherman Ya. E.
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