Excitation spectrum of bilayer ν = 2 quantum Hall systems

Y. Shimoda, T. Nakajima, A. Sawada

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)

Abstract

Excitation spectra in bilayer quantum Hall systems at total Landau-level filling ν=2 are studied by the Hartree-Fock-Bogoliubov approximation. The systems have the spin degrees of freedom in addition to the layer degrees of freedom described in terms of pseudospin. On the excitation spectra from spin-unpolarized and pseudospin-polarized ground state, this approximation fully preserves the spin rotational symmetry and thus can give not only spin-triplet but also spin-singlet excitations systematically. It is also found that the ground-state properties are well described by this approximation.

Original languageEnglish
Pages (from-to)56-59
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

  • Hartree-Fock- Bogoliubov theory
  • Quantum Hall effect
  • Two-dimensional electron systems

ASJC Scopus subject areas

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

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