Anisotropy of current-pumped nuclear spin polarization in the ν = 2/3 quantum Hall state

Kazuki Iwata, Masayuki Morino, Akira Fukuda, Anju Sawada, Michiro Suzuki, Zyun F. Ezawa, Norio Kumada, Yoshiro Hirayama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We investigate the anisotropy of the current-pumped nuclear spin polarization by changing an angle φ between the current I and the in-plane magnetic field B||. The nuclear spin polarization develops at the spin transition point of the quantum Hall state at the Landau level filling factor v = 2/3. When large I is driven, the nuclear spin polarization appears independently of φ. However, as I is decreased, the polarization disappears when B|| is parallel to I, while it remains when B|| is perpendicular to I. The anisotropy indicates the difference of the nuclear spin pumping rate about the direction of B||.

Original languageEnglish
Title of host publicationPhysics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B
Pages643-644
Number of pages2
DOIs
Publication statusPublished - 2007 Dec 1
Externally publishedYes
Event28th International Conference on the Physics of Semiconductors, ICPS 2006 - Vienna, Austria
Duration: 2006 Jul 242006 Jul 28

Publication series

NameAIP Conference Proceedings
Volume893
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other28th International Conference on the Physics of Semiconductors, ICPS 2006
CountryAustria
CityVienna
Period06/7/2406/7/28

Keywords

  • Fractional quantum Hall effect
  • Nuclear spin polarization

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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