Critical behavior of three-dimensional magnets with complicated ordering from three-loop renormalization-group expansions

Details Critical behavior of three-dimensional magnets with complicated ordering from three-loop renormalization-group expansions Critical behavior of three-dimensional magnets with complicated ordering from three-loop renormalization-group expansions

1998-04-21

arxiv.org/abs/cond-mat/9804223v2

Phys. Rev. B 59 (1999) 8363-8366

Physics

Condensed Matter

Statistical Mechanics

10 pages, LaTeX, revised version published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.59.8363

The 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.

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