Effects of in-plane magnetic field direction on the nuclear-spin relaxation in the ν = frac(2, 3) quantum Hall state

K. Iwata, M. Morino, A. Fukuda, M. Suzuki, Z. F. Ezawa, A. Sawada, N. Kumada, Y. Hirayama

Research output: Contribution to journalArticle

Abstract

We investigated effects of the direction of in-plane magnetic field B on the phase transition in the quantum Hall ferromagnet at Landau-level filling factor ν = frac(2, 3) by the nuclear-spin relaxation measurements. We controlled the angle φ between the direction of B and a current I; when B is parallel (perpendicular) to I, φ = 0{ring operator}(φ = 90{ring operator}) . We found that the nuclear spin relaxation rate T1- 1 at φ = 0{ring operator} is about twice as much as that at φ = 90{ring operator}. We discuss the anisotropic behavior of T1- 1 in term of a suppression of low-frequency electron spin fluctuations by B at φ = 90{ring operator}.

Original languageEnglish
Pages (from-to)1175-1177
Number of pages3
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume40
Issue number5
DOIs
Publication statusPublished - 2008 Mar 1

Keywords

  • Fractional quantum Hall state
  • Nuclear spin
  • Tilted magnetic fields

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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