Evidence against an Almeida-Thouless line in disordered systems of Ising dipoles

Article

关键词: SPIN-GLASS MODEL;    MONTE-CARLO;    CRITICAL-BEHAVIOR;    REPLICA-SYMMETRY;    MAGNETIC-FIELD;    ORDERED PHASE;    DIMENSIONALITY;    NANOPARTICLES;    ASSEMBLIES;    PARAMETERS;   

DOI  :  10.1103/PhysRevB.82.144436

来源: SCIE

【 摘 要 】

By tempered Monte Carlo simulations, an Almeida-Thouless (AT) phase-boundary line in site-diluted Ising spin systems is searched for. Spins interact only through dipolar fields and occupy a small fraction of lattice sites. The spin-glass susceptibility of these systems and of the Sherrington-Kirkpatrick model are compared. The correlation length as a function of system size and temperature is also studied. The results obtained are contrary to the existence of an AT line.

【 授权许可】

Free