Open AccessNonequilibrium properties of Sherrington-Kirkpatric spin glass model
Author(s) -
Kai-Cheng Zhang
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.5673
Subject(s) - spin glass , cusp (singularity) , monte carlo method , condensed matter physics , relaxation (psychology) , statistical physics , field (mathematics) , physics , non equilibrium thermodynamics , homogeneous , glass transition , thermodynamics , nuclear magnetic resonance , polymer , statistics , psychology , social psychology , geometry , mathematics , pure mathematics
Using Sherrington-Kirkpatric SK model we investigated the nonequilibrum properties of spin glass by dynamical Monte Carlo simulation. Our results revealed that the susceptibility in the weak field shows a cusp near the glass transition, while the specific heat shows a more broad transition. The aging and zero-field colding memory effect is also reproduced in our simulation, and the phenomena can be explained by energy relaxation. Our simulation also reveals that homogeneous SK model can not reproduce the exchange bias effect observed in the experiment.