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

Katsushi Hashimoto, Koji Muraki, Norio Kumada, Tadashi Saku, Yoshiro Hirayama

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

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 v = 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.

Original languageEnglish
Article number146601
JournalPhysical review letters
Volume94
Issue number14
DOIs
Publication statusPublished - 2005 Apr 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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