Comment on "Transition from Bose glass to a condensate of triplons in Tl$_{1-x}$K$_x$CuCl$_3$"

Details Comment on "Transition from Bose glass to a condensate of triplons in Tl$_{1-x}$K$_x$CuCl$_3$" Comment on "Transition from Bose glass to a condensate of triplons in Tl$_{1-x}$K$_x$CuCl$_3$"

2011-04-04

arxiv.org/abs/1104.0499v3

Physics

Condensed Matter

Strongly Correlated Electrons

1 page, submitted to PRB as Comment on: Yamada et al., PRB 83, 020409(R) (2011)

Scientific paper

We argue that the interpretation of the calorimetric data for disordered quantum antiferromagnets Tl$_{1-x}$K$_x$CuCl$_3$ in terms of Bose Glass physics by F. Yamada {\it et al.} in [Phys. Rev. B {\bf 83}, 020409(R) (2011)] is not unambiguous. A consistent analysis shows no difference in the crossover critical index for the disorder-free TlCuCl$_3$ and its disordered derivatives. Furthermore, we question the very existence of a proper field-induced thermodynamic phase transition in Tl$_{1-x}$K$_x$CuCl$_3$.

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