Effects of inversion asymmetry on electron-nuclear spin coupling in semiconductor heterostructures : Possible role of spin-orbit interactions

Effects of inversion asymmetry on electron-nuclear spin coupling in semiconductor heterostructures : Possible role of spin-orbit interactions

We show that electron-nuclear spin coupling in semiconductor heterostructures is strongly modified by their potential inversion asymmetry. This is demonstrated in a GaAs quantum well, where we observe that the current-induced nuclear spin polarization at Landau-level filling factor nu=2/3 is complet...

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Veröffentlicht in:Physical review letters 2005-04, Vol.94 (14), p.146601.1-146601.4, Article 146601
Hauptverfasser: HASHIMOTO, Katsushi, MURAKI, Koji, KUMACA, Norio, SAKU, Tadashi, HIRAYAMA, Yoshiro
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Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic transport in condensed matter
Exact sciences and technology
Physics
Spin polarized transport
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container_end_page 146601.4
container_issue 14
container_start_page 146601.1
container_title Physical review letters
container_volume 94
creator HASHIMOTO, Katsushi
MURAKI, Koji
KUMACA, Norio
SAKU, Tadashi
HIRAYAMA, Yoshiro
description We show that electron-nuclear spin coupling in semiconductor heterostructures is strongly modified by their potential inversion asymmetry. This is demonstrated in a GaAs quantum well, where we observe that the current-induced nuclear spin polarization at Landau-level filling factor nu=2/3 is completely suppressed when the quantum well is made largely asymmetric with gate voltages. Furthermore, we find that the nuclear spin relaxation rate is also modified by the potential asymmetry. These findings strongly suggest that even a very weak Rashba spin-orbit interaction can play a dominant role in determining the electron-nuclear spin coupling.
doi_str_mv 10.1103/physrevlett.94.146601
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subjects Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic transport in condensed matter
Exact sciences and technology
Physics
Spin polarized transport
title Effects of inversion asymmetry on electron-nuclear spin coupling in semiconductor heterostructures : Possible role of spin-orbit interactions
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