Ensemble dependence of the critical behavior of a system with long-range interaction and quenched randomness

Nir Schreiber, Reuven Cohen, Simi Haber

Research output: Contribution to journalArticlepeer-review

Abstract

We propose a hybrid model governed by the Blume-Emery-Griffiths (BEG) Hamiltonian with a mean-field-like interaction, where the spins are randomly quenched such that some of them are "pure"Ising and the others admit the BEG set of states. It is found, by varying the concentration of the Ising spins, that the model displays different phase portraits in concentration-temperature parameter space, within the canonical and the microcanonical ensembles. Phenomenological indications that these portraits are rich and rather unusual are provided.

Original languageEnglish
Article number024124
JournalPhysical Review E
Volume108
Issue number2
DOIs
StatePublished - Aug 2023

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Statistics and Probability

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