Effects of in-plane magnetic fields on spin transitions in bilayer quantum Hall states

N. Kumada, K. Tagashira, K. Iwata, A. Sawada, Z. F. Ezawa, K. Muraki, T. Saku, Y. Hirayama

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

In a bilayer system, various phase transitions occur due to the competition among the cyclotron, Zeeman and tunneling energies. We investigate effects of an in-plane magnetic field B , which couples subband and Landau levels with the same spin and modulate wave functions extended to both layers, on transitions of quantum Hall states in such a system. As B is applied, we observe that crossings between opposite spin levels as well as those between the same spin levels disappear in characteristic sequences. While anticrossings of single-particle levels are sufficient to explain the observed behavior for crossings at ν=4, the data at ν=6 are not understood in a single-particle picture, and suggest Coulomb-induced mixing of different spin levels.

Original languageEnglish
Pages (from-to)36-39
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume22
Issue number1-3
DOIs
Publication statusPublished - 2004 Apr
Event15th International Conference on ELectronic Propreties - Nara, Japan
Duration: 2003 Jul 142003 Jul 18

Keywords

  • GaAs/AlGaAs
  • Phase transition
  • Quantum hall effect

ASJC Scopus subject areas

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

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