Simultaneous excitation of spins and pseudospins in the bilayer ν = 1 quantum Hall state

D. Terasawa, M. Morino, K. Nakada, S. Kozumi, A. Sawada, Z. F. Ezawa, N. Kumada, K. Muraki, T. Saku, Y. Hirayama

Research output: Contribution to journalConference articlepeer-review

25 Citations (Scopus)

Abstract

The tilting angular dependence of the energy gap was measured in the bilayer quantum Hall state at the Landau level filling ν=1 by changing the density imbalance between the two layers. The observed gap behavior shows a continuous transformation from the bilayer balanced density state to the monolayer state. Even a sample with 33 K tunneling gap shows the same activation energy anomaly reported by Murphy et al. (Phys. Rev. Lett. 72 (1994) 728). We discuss a possible relation between our experimental results and the quantum Hall ferromagnet of spins and pseudospins.

Original languageEnglish
Pages (from-to)52-55
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume22
Issue number1-3
DOIs
Publication statusPublished - 2004 Apr
Externally publishedYes
Event15th International Conference on ELectronic Propreties - Nara, Japan
Duration: 2003 Jul 142003 Jul 18

Keywords

  • Bilayer system
  • Meron-pair
  • Quantum Hall effect
  • Skyrmion

ASJC Scopus subject areas

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

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