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

Negrete, Oscar A.; Vargas, Patricio; Pena, Francisco J.; Saravia, Gonzalo; Vogel, Eugenio E.


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 -> infinity. 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.

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Título según WOS: ID WOS:000689210900001 Not found in local WOS DB
Título de la Revista: ENTROPY
Volumen: 23
Número: 8
Editorial: MDPI
Fecha de publicación: 2021


Notas: ISI