Preferred number of flipped spins in Skyrmion excitation

N. Kumada, A. Sawada, Z. F. Ezawa, H. Azuhata, S. Nagahama, K. Muraki, T. Saku, Y. Hirayama

Research output: Contribution to journalArticle

Abstract

We measured the activation energy of the Skyrmion excitations in the monolayer quantum Hall (QH) state at the Landau-level filling factor ν = 1 and in the bilayer QH state at ν = 2. The number of flipped spins Ns changes from 7 to 1 in the monolayer sample and in the bilayer sample with small tunneling energy gap, while Ns changes from 14 to 7 and finally to 1 in the bilayer sample with large tunneling energy gap. These experimental data suggest the existence of the preferred number of flipped spins Ns = 7 for a Skyrmion-pair excitation.

Original languageEnglish
Pages (from-to)169-172
Number of pages4
JournalPhysica B: Condensed Matter
Volume298
Issue number1-4
DOIs
Publication statusPublished - 2001 Apr 1
Externally publishedYes

Keywords

  • GaAs/AlGaAs
  • Quantum Hall effect
  • Skyrmion

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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  • Cite this

    Kumada, N., Sawada, A., Ezawa, Z. F., Azuhata, H., Nagahama, S., Muraki, K., Saku, T., & Hirayama, Y. (2001). Preferred number of flipped spins in Skyrmion excitation. Physica B: Condensed Matter, 298(1-4), 169-172. https://doi.org/10.1016/S0921-4526(01)00294-0