Anisotropic electron spin lifetimes in strained undoped (In,Ga)As/GaAs (110) quantum wells of different width and height are investigated by time-resolved Faraday rotation and time-resolved transmission and are compared to the (001)-orientation. From the suppression of spin precession, the ratio of in-plane to out-of-plane spin lifetimes is calculated. Whereas the ratio increases with In concentration in agreement with theory, a surprisingly high anisotropy of 480 is observed for the broadest quantum well, when expressed in terms of spin relaxation times.
@article{arxiv.cond-mat/0701104,
title = {Anisotropic Electron Spin Lifetime in (In,Ga)As/GaAs (110) Quantum Wells},
author = {L. Schreiber and D. Duda and B. Beschoten and G. Güntherodt and H. -P. Schönherr and J. Herfort},
journal= {arXiv preprint arXiv:cond-mat/0701104},
year = {2007}
}