Metallic Continuum Quantum Ferromagnets at Finite Temperature

Details Metallic Continuum Quantum Ferromagnets at Finite Temperature Metallic Continuum Quantum Ferromagnets at Finite Temperature

2002-08-08

arxiv.org/abs/cond-mat/0208185v2

Europhys. Letters 62, 890 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

Corrected typos, new discussion of T=0 results, to appear in Europhys. Lett

Scientific paper

We study via renormalization group (RG) and large N methods the problem of continuum SU(N) quantum Heisenberg ferromagnets (QHF) coupled to gapless electrons. We establish the phase diagram of the dissipative problem and investigate the changes in the Curie temperature, magnetization, and magnetic correlation length due to dissipation and both thermal and quantum fluctuations. We show that the interplay between the topological term (Berry's phase) and dissipation leads to non-trivial effects for the finite temperature critical behavior.

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