Physics – Condensed Matter – Statistical Mechanics
Scientific paper
1999-08-09
Physics
Condensed Matter
Statistical Mechanics
4 pages, revtex, 4 eps figures
Scientific paper
10.1103/PhysRevLett.84.5868
The recent observation [Oosawa et al. J. Phys. : Condens. Matter {\bf 11}, 265 (1999)] of the field-induced N\'{e}el ordering in a spin-gap magnetic compound TlCuCl$_3$ is interpreted as a Bose-Einstein Condensation of magnons. A mean-field calculation based on this picture is shown to describe well the temperature dependence of the magnetization. The present system opens a new area for studying Bose-Einstein condensation of thermodynamically large number of particles in a grand-canonical ensemble.
Nikuni Tetsuro
Oosawa Akira
Oshikawa Masaki
Tanaka Hajime
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