Detection of anomalous Hall voltages in ultrahigh-mobility two-dimensional hole gases generated by optical spin orientation
Vasyukov, D.A. and Plaut, A.S. and Henini, M. and Pfeiffer, L.N. and West, K.W. and Nicoll, C.A. and Farrer, I. and Ritchie, D.A. (2015) Detection of anomalous Hall voltages in ultrahigh-mobility two-dimensional hole gases generated by optical spin orientation. Physical Review B, 91 (20). 201406/1-201406/5. ISSN 1098-0121
By combining optical spin orientation and an externally applied longitudinal electric field, transverse charge accumulation has been detected in very high-mobility two-dimensional hole gases by measuring the transverse voltage drop across simple Hall devices. Our results indicate intrinsic band-structure (rather than extrinsic skew scattering) derived spin-orbit coupling as the underlying mechanism of this spin-polarized transport effect.
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