Anisotropy of magnetoresistance hysteresis around the ν = 2/3 quantum Hall state in tilted magnetic field

Kazuki Iwata, Masayuki Morino, Akira Fukuda, Norio Kumada, Zyun Francis Ezawa, Yoshiro Hirayama, Anju Sawada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We present an anisotropy of the hysteretic transport around the spin transition point at the Landau level filling factor ν = 2/3 in a tilted magnetic field. When the direction of the in-plane component of the magnetic field B is normal to the probe current I, a strong hysteretic transport due to the current-induced nuclear spin polarization occurs. When B is parallel to I, on the other hand, the hysteresis almost disappears. We also demonstrate that the nuclear spin-lattice relaxation rate T1-1 at the transition point increases with decreasing angle between the directions of B and I. These results suggest that the morphology of electron spin domains around ν = 2/3 is affected by the current direction.

Original languageEnglish
Article number123701
Journaljournal of the physical society of japan
Volume79
Issue number12
DOIs
Publication statusPublished - 2010 Dec

Keywords

  • Domain structure
  • Dynamic nuclear polarization
  • Fractional quantum Hall effect
  • Hyperfine interaction
  • Nuclear spin system
  • Spin-lattice relaxation rate
  • Two-dimensional electron system

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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