Phase diagram of a 2D Ising model within a nonextensive approach

resumo

In this work we report Monte Carlo simulations of a 2D Ising model, in which the statistics of the Metropolis algorithm is replaced by the nonextensive one. We compute the magnetization and show that phase transitions are present for q not equal 1. A q-phase diagram (critical temperature vs. the entropic parameter q) is built and exhibits some interesting features, such as phases which are governed by the value of the entropic index q. It is shown that such phases favors some energy levels of magnetization states. It is also shown that the contribution of the Tsallis cutoff is capital to the existence of phase transitions.

palavras-chave

LONG-RANGE INTERACTIONS; TSALLIS STATISTICS; MAGNETIC SYSTEMS; THERMOSTATISTICS; TEMPERATURE; THERMODYNAMICS; SIMULATION; MECHANICS; EVIDENCES; PRESSURE

categoria

Physics

autores

Soares-Pinto, DO; Oliveira, IS; Reis, MS

Grupos

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