Anisotropic spin dephasing in a (110)-grown high-mobility GaAs/AlGaAs quantum well measured by resonant spin amplification technique

Michael Griesbeck, Mikhail Glazov, Eugene Sherman, Tobias Korn, Dieter Schuh, Werner Wegscheider, Christian Schüller

Research outputpeer-review

1 Citation (Scopus)


Spin dynamics in zincblende two-dimensional electron systems is usually dominated by the Dyakonov-Perel spin dephasing mechanism resulting from the underlying spin-orbit fields. An exceptional situation is realized in symmetrically grown and doped GaAs/AlGaAs quantum wells grown along the [110] direction, where the Rashba contribution is negligible and the effective Dresselhaus spin-orbit field is perpendicular to the sample plane. In such a system the spin dephasing times for in- and out-of-plane crystallographic directions are expected to be strongly different and the out-of-plane spin dephasing time is significantly enhanced as compared with conventional systems. We observe the spin relaxation anisotropy by resonant spin amplification measurements in a 30 nm wide double-sided symmetrically δ-doped single quantum well with a very high mobility of about 3·106 cm 2/Vs at 1.5K. A comparison of the measured resonant spin amplification traces with the developed theory taking into account the spin dephasing anisotropy yields the dephasing times whose anisotropy and magnitudes are in-line with the theoretical expectations.

Original languageEnglish
Title of host publicationSpintronics IV
Publication statusPublished - 11 Oct 2011
EventSpintronics IV - San Diego, CA
Duration: 21 Aug 201124 Aug 2011


ConferenceSpintronics IV
CountryUnited States
CitySan Diego, CA

Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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