Effective negative specific heat by destabilization of metastable states in dipolar systems

19 Feb 2020 Loladze Vazha Dauxois Thierry Khomeriki Ramaz Ruffo Stefano

We study dipolarly coupled three dimensional spin systems in both the microcanonical and the canonical ensembles by introducing appropriate numerical methods to determine the microcanonical temperature and by realizing a canonical model of heat bath. In the microcanonical ensemble, we show the existence of a branch of stable antiferromagnetic states in the low energy region... (read more)

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Categories


  • STATISTICAL MECHANICS
  • CHAOTIC DYNAMICS