Effect of Initial Spin Polarization on Spin Dephasing and the Electron g Factor in a High-Mobility Two-Dimensional Electron System

DOI to cite this document:: 10.5283/epub.12473

Stich, Dominik ; Zhou, J. ; Korn, Tobias

; Schulz, Robert ; Schuh, Dieter ; Wegscheider, Werner ; Wu, Meng W. ; Schüller, Christian

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Date of publication of this fulltext: 25 Jan 2010 13:47

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Abstract

We have investigated the spin dynamics of a high-mobility two-dimensional electron system (2DES) in a GaAs-Al0.3Ga0.7As single quantum well by time-resolved Faraday rotation in dependence on the initial degree of spin polarization, P, of the 2DES. From P similar to 0 to P similar to 30%, we observe an increase of the spin dephasing time, T-2*, by an order of magnitude, from about 20 ps to 200 ps, ...