Suppressed spin dephasing for two-dimensional and bulk electrons in GaAs wires due to engineered cancellation of spin-orbit interaction terms

S.Z. Denega, Thorsten Last, J. Liu, A. Slachter, P.J. Rizo, P.H.M. van Loosdrecht, B.J. van Wees, D. Reuter, A.D. Wieck, C.H. van der Wal

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Abstract

We report a study of suppressed spin dephasing for quasi-one-dimensional electron ensembles in wires etched into a GaAs/AlGaAs heterojunction system. Time-resolved Kerr-rotation measurements show a suppression that is most pronounced for wires along the [110] crystal direction. This is the fingerprint of a suppression that is enhanced due to a strong anisotropy in spin-orbit fields that can occur when the Rashba and Dresselhaus contributions are engineered to cancel each other. A surprising observation is that this mechanism for suppressing spin dephasing is not only effective for electrons in the heterojunction quantum well but also for electrons in a deeper bulk layer.

Original languageEnglish
Article number153302
Pages (from-to)11-15
Number of pages4
JournalPhysical Review. B: Condensed Matter and Materials Physics
Volume81
Issue number15
DOIs
Publication statusPublished - 12-Apr-2010

Keywords

  • QUANTUM-WELLS
  • POLARIZATION
  • ANISOTROPY

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