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

Fumiko Yamada, Hidekazu Tanaka, Toshio Ono, Hiroyuki Nojiri

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number020409
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume83
Issue number2
DOIs
Publication statusPublished - 2011 Jan 21

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Transition from Bose glass to a condensate of triplons in Tl <sub>1-x</sub>K<sub>x</sub>CuCl<sub>3</sub>'. Together they form a unique fingerprint.

Cite this