Spin-orbit interaction and spin relaxation in a two-dimensional electron gas

Details Spin-orbit interaction and spin relaxation in a two-dimensional electron gas Spin-orbit interaction and spin relaxation in a two-dimensional electron gas

2008-09-17

arxiv.org/abs/0809.2848v2

Physical Review B, 2009, 79, 045302

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 5 figures

Scientific paper

10.1103/PhysRevB.79.045302

Using time-resolved Faraday rotation, the drift-induced spin-orbit Field of a two-dimensional electron gas in an InGaAs quantum well is measured. Including measurements of the electron mobility, the Dresselhaus and Rashba coefficients are determined as a function of temperature between 10 and 80 K. By comparing the relative size of these terms with a measured in-plane anisotropy of the spin dephasing rate, the D'yakonv-Perel' contribution to spin dephasing is estimated. The measured dephasing rate is significantly larger than this, which can only partially be explained by an inhomogeneous g-factor.

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