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Bose-Einstein Condensation of Magnons in Cs2CuCl4 | | T. Radu
; H. Wilhelm
; V. Yushankhai
; D. Kovrizhin
; R. Coldea
; Z. Tylczynski
; T. Luehmann
; F. Steglich
; | | Date: |
3 May 2005 | | Subject: | Other DOI: 10.1103/PhysRevLett.95.127202 | cond-mat.other | | 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 B<12 T and for temperatures T>30 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 phisimeq 1.5. These findings are interpreted as a Bose-Einstein condensation of magnons. | | Source: | arXiv, cond-mat/0505058 | | Other source: | [GID 207435] pmid16197102 | | Services: | Forum | Review | PDF | Favorites | |
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