Bose-Einstein condensation of magnons

Details Bose-Einstein condensation of magnons Bose-Einstein condensation of magnons

2004-05-26

arxiv.org/abs/cond-mat/0405619v1

Physics

Condensed Matter

Superconductivity

11 pages, revtex4

Scientific paper

We use the Renormalization Group method to study the Bose-Einstein condensation of the interacting dilute magnons which appears in three dimensional spin systems in magnetic field. The obtained temperature dependence of the critical field $H_c(T)-H_c(0) \sim T^{2}$ is different from the recent self-consistent Hartree-Fock-Popov calculations (cond-mat/0405422) in which a $T^{3/2}$ dependence was reported . The origin of this difference is discussed in the framework of quantum critical phenomena.

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