Electrically Controlled Nuclear Spin Polarization and Relaxation by Quantum-Hall States

K. Hashimoto, K. Muraki, T. Saku, Y. Hirayama

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We study interactions between electrons and nuclear spins by using the resistance ([Formula presented]) peak which develops near the Landau-level filling factor [Formula presented] as a probe. Temporarily tuning [Formula presented] to a different value, [Formula presented], with a gate demonstrates that the [Formula presented] peak regenerates even after complete depletion ([Formula presented]), while it rapidly relaxes on either side of [Formula presented]. This indicates that the [Formula presented] domain morphology is memorized by the nuclear spins which can be rapidly depolarized by Skyrmions. An additional enhancement in the nuclear spin relaxation around [Formula presented] and [Formula presented] suggests a Fermi sea of partially polarized composite fermions.

Original languageEnglish
Number of pages1
JournalPhysical Review Letters
Volume88
Issue number17
DOIs
Publication statusPublished - 2002 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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