Pokrovsky-Talapov model at finite temperature: A renormalization-group analysis

Article

关键词: COMMENSURATE-INCOMMENSURATE TRANSITION;    QUANTUM HALL SYSTEMS;    SPONTANEOUS INTERLAYER COHERENCE;    FUNCTIONAL RENORMALIZATION;    WETTING TRANSITIONS;    PHASE-TRANSITIONS;    VORTICES;    EQUATION;    FIELD;   

DOI  :  10.1103/PhysRevB.80.245418

来源: SCIE

【 摘 要 】

We calculate the finite-temperature shift of the critical wave vector Q(c) of the Pokrovsky-Talapov model using a renormalization-group analysis. Separating the Hamiltonian into a part that is renormalized and one that is not, we obtain the flow equations for the stiffness and an arbitrary potential. We then specialize to the case of a cosine potential, and compare our results to well-known results for the sine-Gordon model, to which our model reduces in the limit of vanishing driving wave vector Q=0. Our results may be applied to describe the commensurate-incommensurate phase transition in several physical systems and allow for a more realistic comparison with experiments, which are always carried out at a finite temperature.

【 授权许可】

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