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 articlepeer-review

18 Citations (Scopus)


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
Issue number1-3
Publication statusPublished - 2003 May
Event23rd International Conference on Low Temperature Physics - Hiroshima, Japan
Duration: 2002 Aug 202002 Aug 27


  • Bilayer system
  • Magnetotransport
  • Quantum Hall effect
  • Skyrmion


Dive into the research topics of 'Continuous transformation from spin- to pseudospin-type excitation'. Together they form a unique fingerprint.

Cite this