Measurement of spin-dependent conductivities in a two-dimensional electron gas
Ebrahimnejad, H. and Ren, Y. and Frolov, S. M. and Adagideli, İnanç and Folk, J. A. and Wegscheider, W. (2010) Measurement of spin-dependent conductivities in a two-dimensional electron gas. Physical Review B, 82 (4). ISSN 1098-0121
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Official URL: http://dx.doi.org/10.1103/PhysRevB.82.041305
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 nonlocal 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 two-dimensional electron gas.
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