Critical thermodynamics of a three-dimensional chiral model for N > 3

Article

关键词: RENORMALIZATION-GROUP ANALYSIS;    STACKED TRIANGULAR LATTICES;    CRITICAL EXPONENTS;    PHASE-TRANSITIONS;    XY ANTIFERROMAGNET;    NEUTRON-SCATTERING;    EPSILON-EXPANSION;    CRITICAL-BEHAVIOR;    FIELD-THEORY;    SPIN MODELS;   

DOI  :  10.1103/PhysRevB.68.094415

来源: SCIE

【 摘 要 】

The critical behavior of the three-dimensional N-vector chiral model is studied for arbitrary N. The known six-loop renormalization-group (RG) expansions are resummed using the Borel transformation combined with the conformal mapping and Pade approximant techniques. Analyzing the fixed-point location and the structure of RG flows, it is found that two marginal values of N exist which separate domains of continuous chiral phase transitions N>N-c1 and NN>N-c2 where such transitions are first order. Our calculations yield N-c1=6.4(4) and N-c2=5.7(3). For N>N-c1 the structure of RG flows is identical to that given by the epsilon and 1/N expansions with the chiral fixed point being a stable node. For N

【 授权许可】

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