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

Abstract

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${}_3$.

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

References in corpus (1)

• Consequences of spin-orbit coupling for the Bose-Einstein condensation of magnons

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• Reply to "Comment on `Transition from Bose glass to a condensate of triplons in Tl${}_{1-x}$K${}_x$CuCl${}_3$'"
• Field-induced ordering in a random-bond quantum spin ladder compound with weak anisotropy