Continuous transformation from spin- to pseudospin-type excitation

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

Research output: Contribution to journalConference article

17 Citations (Scopus)

Abstract

We measured the activation energy of bilayer ν = 1 quantum Hall states. By changing the density difference between layers, the tilting behavior of the pseudospin(P)-type activation energy at the equal density point gradually transforms into the spin(S)-type one at the monolayer density point. At the intermediate density difference, by increasing the tilting angle the activation energy starts to decrease as the P-type excitation gap and then increases as the S-type excitation gap. It is impossible to explain this behavior by the level crossing of the P- and S-type excitations. The result of the overall behavior indicates the excitation in a bilayer system is the simultaneous flip of spin and pseudospin.

Original languageEnglish
Pages (from-to)118-119
Number of pages2
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume18
Issue number1-3
DOIs
Publication statusPublished - 2003 May 1
Externally publishedYes
Event23rd International Conference on Low Temperature Physics - Hiroshima, Japan
Duration: 2002 Aug 202002 Aug 27

Keywords

  • Bilayer system
  • Magnetotransport
  • 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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  • Cite this

    Sawada, A., Terasawa, D., Kumada, N., Morino, M., Tagashira, K., Ezawa, Z. F., Muraki, K., Saku, T., & Hirayama, Y. (2003). Continuous transformation from spin- to pseudospin-type excitation. Physica E: Low-Dimensional Systems and Nanostructures, 18(1-3), 118-119. https://doi.org/10.1016/S1386-9477(02)01040-8