Bose-Einstein Condensation of Magnons in Cs2CuCl4

Preprint

3 May 2005

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0505058

Abstract

We report on results of specific heat measurements on single crystals of the frustrated quasi-2D spin-1/2 antiferromagnet Cs_2CuCl_4 (T_N=0.595 K) in external magnetic fields B30 mK. Decreasing B from high fields leads to the closure of the field-induced gap in the magnon spectrum at a critical field B_c = 8.51 T and a magnetic phase transition is clearly seen below B_c. In the vicinity to B_c, the phase transition boundary is well described by the power-law T_c(B)\propto (B_c-B)^{1/\phi} with the measured critical exponent \phi\simeq 1.5. These findings are interpreted as a Bose-Einstein condensation of magnons.

Keywords

MAGNETIC PHASE TRANSITION
CONDENSATION OF MAGNONS
EINSTEIN CONDENSATION
PHASE TRANSITION
ANTIFERROMAGNET
BOSE EINSTEIN
CS2CUCL4
MAGNONS
B_C

All Related Versions

Version 1, 2005-05-03, ArXiv
Published version: Physical Review Letters, 95 (12), 127202.

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