Spin accumulation is generated by injecting an unpolarized charge current into a channel of GaAs two-dimensional electron gas subject to an in-plane magnetic field, then measured in a non-local geometry. Unlike previous measurements that have used spin-polarized nanostructures, here the spin accumulation arises simply from the difference in bulk conductivities for spin-up and spin-down carriers. Comparison to a diffusive model that includes spin subband splitting in magnetic field suggests a significantly enhanced electron spin susceptibility in the 2D electron gas.
@article{arxiv.1005.3559,
title = {Measurement of spin-dependent conductivities in a two-dimensional electron gas},
author = {H. Ebrahimnejad and Y. Ren and S. M. Frolov and I. Adagideli and J. A. Folk and W. Wegscheider},
journal= {arXiv preprint arXiv:1005.3559},
year = {2015}
}