Short-Range Berezinskii-Kosterlitz-Thouless Phase Characterization for the q-State Clock Model

Author:

Negrete Oscar A.ORCID,Vargas PatricioORCID,Peña Francisco J.ORCID,Saravia Gonzalo,Vogel Eugenio E.

Abstract

Beyond the usual ferromagnetic and paramagnetic phases present in spin systems, the usual q-state clock model presents an intermediate vortex state when the number of possible orientations q for the system is greater than or equal to 5. Such vortex states give rise to the Berezinskii-Kosterlitz-Thouless (BKT) phase present up to the XY model in the limit q→∞. Based on information theory, we present here an analysis of the classical order parameters plus new short-range parameters defined here. Thus, we show that even using the first nearest neighbors spin-spin correlations only, it is possible to distinguish the two transitions presented by this system for q greater than or equal to 5. Moreover, the appearance at relatively low temperature and disappearance of the BKT phase at a rather fix higher temperature is univocally determined by the short-range interactions recognized by the information content of classical and new parameters.

Publisher

MDPI AG

Subject

General Physics and Astronomy

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