Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-10-13
Phys. Rev. B 81, 153302 (2010)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 3 figures
Scientific paper
10.1103/PhysRevB.81.153302
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 mechanisms for suppressing spin dephasing is not only effective for electrons in the heterojunction quantum well, but also for electrons in a deeper bulk layer.
Denega S. Z.
der Wal Caspar H. van
Last T.
Liu Jinjie
Reuter Dennis
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