The absence of the Rashba spin-splitting in undoped asymmetric quantum wells

P. S. Eldridge, W. J.H. Leyland, J. D. Mar, P. G. Lagoudakis, R. Winkler, O. Z. Karimov, M. Henini, D. Taylor, R. T. Phillips, R. T. Harley

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

It is widely accepted that quantum wells with potential profiles lacking inversion symmetry will exhibit spin-split conduction band states due to the Rashba spin-orbit interaction. Here we measure conduction band splitting for undoped asymmetric and symmetric GaAs/AlGaAs quantum wells in the absence of electric fields. Surprisingly the conduction band spin-splitting measured in asymmetric quantum wells is no greater than that measured in symmetric quantum wells. This is a consequence of Ehrenfests theorem and the fact that the conduction and valence band edge profiles are related by a constant factor.

Original languageEnglish
Title of host publicationPhysics of Semiconductors - 29th International Conference, ICPS 29
Pages397-398
Number of pages2
DOIs
Publication statusPublished - 2009
Externally publishedYes
Event29th International Conference on Physics of Semiconductors, ICPS 29 - Rio de Janeiro, Brazil
Duration: 27 Jul 20081 Aug 2008

Publication series

NameAIP Conference Proceedings
Volume1199
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference29th International Conference on Physics of Semiconductors, ICPS 29
Country/TerritoryBrazil
CityRio de Janeiro
Period27/07/081/08/08

Keywords

  • Rashba
  • Spin dynamics

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