Macroscopic transport of a current-induced spin polarization

33rd International Conference on the Physics of Semiconductors

Ullah, S.^1 ; Ferreira, G.J.^2 ; Gusev, G.M.^1 ; Bakarov, A.K.^3 ; Hernandez, F.G.G.^1

Instituto de Física, Universidade de São Paulo, São Paulo, SP

05508-090, Brazil^1

Instituto de Física, Universidade Federal de Uberlndia, Uberlndia, MG

38400-902, Brazil^2

Institute of Semiconductor Physics, Novosibirsk State University, Novosibirsk

630090, Russia^3

关键词: Electron g-factor;    Electron spins;    GaAs/AlGaAs quantum well;    Kerr rotation;    Macroscopic transport;    Spatially resolved imaging;    Spin transport;    Time-resolved;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/864/1/012060/pdf
DOI  :  10.1088/1742-6596/864/1/012060

来源: IOP

【 摘 要 】

Experimental studies of spin transport in a two-dimensional electron gas hosted by a triple GaAs/AlGaAs quantum well are reported. Using time-resolved Kerr rotation, we observed the precession of the spin polarization about a current-controlled spin-orbit magnetic field. Spatially-resolved imaging showed a large variation of the electron g-factor and the drift transport of coherent electron spins over distances exceeding half-millimetre in a direction transverse to the electric field.