Finite-temperature transitions in bilayer quantum Hall systems

Min Fong Yang, Ming Che Chang

研究成果: 雜誌貢獻期刊論文同行評審

3 引文 斯高帕斯(Scopus)

摘要

In this paper, the influence of an in-plane magnetic field (Formula presented) on the transitions at finite temperatures in (Formula presented) bilayer quantum Hall systems is examined. It is found that there can exist two types of characteristic temperatures which separate different regions in the phase diagram. The first is the Kosterlitz-Thouless (KT) transition temperature, which can have an unusual nonmonotonic dependence on (Formula presented) the second type originates from the crossing of energy levels and always increases with (Formula presented) Based on these results, we point out that the threshold temperature observed in the inelastic light scattering experiments cannot be the KT transition temperature, because the latter shows a totally different (Formula presented) dependence as compared with the experimental observation. Instead, it should be the level-crossing temperature, which we found agrees with the (Formula presented) dependence observed. Thus an investigation of the KT transition in the bilayer quantum Hall systems awaits experimental measurements to probe the proposed canted antiferromagnetic phase more directly.

原文英語
頁(從 - 到)R2429-R2432
期刊Physical Review B - Condensed Matter and Materials Physics
61
發行號4
DOIs
出版狀態已發佈 - 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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