Transition from Bose glass to a condensate of triplons in Tl 1-xKxCuCl3

Fumiko Yamada, Hidekazu Tanaka, Toshio Ono, Hiroyuki Nojiri

研究成果: Article査読

41 被引用数 (Scopus)

抄録

We report the magnetic-field-induced Bose glass-Bose-Einstein condensate (BEC) transition of triplons in Tl1-xKxCuCl3 and its critical behavior, which were investigated through specific heat and electron spin resonance (ESR) measurements. The field dependence of the BEC transition temperature TN can be described by the power law [H-H c]TNφ near the quantum critical point Hc∼3 T. The critical exponent . tends to reach a value smaller than 1/2 with decreasing fitting window in contrast to φ→3/2 for the standard BEC in a pure system. At sufficiently low temperatures, the ESR line shape for H≃Hc is intermediate between Gaussian and Lorentzian functions. This implies the localization of triplons for H<Hc at T=0.

本文言語English
論文番号020409
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
83
2
DOI
出版ステータスPublished - 2011 1月 21

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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