Phys. Rev. B 77, 125344 (2008) [5 pages]

All-optical measurement of Rashba coefficient in quantum wells

Abstract

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P. S. Eldridge¹, W. J. H. Leyland², P. G. Lagoudakis¹, O. Z. Karimov¹, M. Henini³, D. Taylor³, R. T. Phillips², and R. T. Harley¹
¹School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom
²Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, United Kingdom
³School of Physics and Astronomy, University of Nottingham, Nottingham NG7 4RD, United Kingdom

Received 5 February 2008; published 31 March 2008

We perform an all-optical spin-dynamic measurement of the Rashba spin-orbit interaction in (110)-oriented GaAs∕AlGaAs quantum wells under applied electric field. This crystallographic orientation allows us to isolate the Rashba from other contributions, giving precise values of the Rashba coefficient. At low temperature, we find good agreement between our measurements and the k⋅p theory. Unexpectedly, we observe a temperature dependence of the Rashba coefficient that may signify the importance of higher-order terms of the Rashba coupling.

URL:

http://link.aps.org/doi/10.1103/PhysRevB.77.125344

DOI:

10.1103/PhysRevB.77.125344

PACS:

72.25.Fe, 72.25.Rb, 73.21.Fg

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Phys. Rev. B 77, 125344 (2008) [5 pages]

All-optical measurement of Rashba coefficient in quantum wells