Spin-Dephasing Anisotropy for Electrons in a Diffusive Quasi-1D GaAs Wire

We present a numerical study of dephasing of electron spin ensembles in a diffusive quasi-one-dimensional GaAs wire due to the D’yakonov–Perel’ spin-dephasing mechanism. For widths of the wire below the spin precession length and for equal strength of Rashba and linear Dresselhaus spin–orbit fields...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2010-01, Vol.23 (1), p.11-15
Main Authors: Liu, J., Last, T., Koop, E. J., Denega, S., van Wees, B. J., van der Wal, C. H.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic transport in condensed matter
Exact sciences and technology
Magnetic Materials
Magnetism
Physics
Physics and Astronomy
Review Paper
Spin polarized transport
Strongly Correlated Systems
Superconductivity
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Summary:We present a numerical study of dephasing of electron spin ensembles in a diffusive quasi-one-dimensional GaAs wire due to the D’yakonov–Perel’ spin-dephasing mechanism. For widths of the wire below the spin precession length and for equal strength of Rashba and linear Dresselhaus spin–orbit fields a strong suppression of spin-dephasing is found. This suppression of spin-dephasing shows a strong dependence on the wire orientation with respect to the crystal lattice. The relevance for realistic cases is evaluated by studying how this effect degrades for deviating strength of Rashba and linear Dresselhaus fields, and with the inclusion of the cubic Dresselhaus term.
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-009-0525-2