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28 March 2024
 
  » arxiv » cond-mat/9804223

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Critical behavior of three-dimensional magnets with complicated ordering from three-loop renormalization-group expansions
A. I. Sokolov ; K. B. Varnashev ;
Date 21 Apr 1998
Journal Phys. Rev. B 59 (1999) 8363-8366
Subject Statistical Mechanics | cond-mat.stat-mech
AffiliationSaint Petersburg Electrotechnical University, St.Petersburg, Russia
AbstractThe critical behavior of a model describing phase transitions in 3D antiferromagnets with 2N-component real order parameters is studied within the renormalization-group (RG) approach. The RG functions are calculated in the three-loop order and resummed by the generalized Pade-Borel procedure preserving the specific symmetry properties of the model. An anisotropic stable fixed point is found to exist in the RG flow diagram for N > 1 and lies near the Bose fixed point; corresponding critical exponents are close to those of the XY model. The accuracy of the results obtained is discussed and estimated.
Source arXiv, cond-mat/9804223
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