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

Article

关键词: 4-COMPONENT VECTOR MODELS;    CRITICAL EXPONENTS;    EPSILON-EXPANSION;    PHYSICAL REALIZATIONS;    FIXED-POINT;    TRANSITIONS;    STABILITY;    LAMBDA;   

DOI  :  10.1103/PhysRevB.59.8363

来源: SCIE

【 摘 要 】

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 greater than or equal to 2 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. [S0163-1829(99)00810-3].

【 授权许可】

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