Zero-temperature nonequilibrium dynamics of the spherical Scherrington-Kirkpatrick model of a spin glass in an external field

Autor:	E. V. Gazeeva, I. R. Khaibutdinova, Gaetano Busiello, R. V. Saburova
Rok vydání:	2007
Předmět:	Physics Spin glass Condensed matter physics Spin polarization Correlation function Quantum electrodynamics General Physics and Astronomy Zero field splitting Langevin dynamics Critical value Constant (mathematics) Magnetic field
Zdroj:	Russian Physics Journal. 50:314-322
ISSN:	1573-9228 1064-8887
DOI:	10.1007/s11182-007-0043-2
Popis:	The decay of the nonequilibrium spin-spin autocorrelation function is calculated analytically and numerically based on the Langevin dynamics for the spherical Scherrington-Kirkpatrick model (p = 2) of a spin glass in a constant magnetic field at zero temperature. The behavior of the spin system is analyzed for different amplitudes of the external constant magnetic field and different waiting times. In the mean-field approximation, the critical value of the external magnetic field is found. The occurrence of the spin-glass phase in weak magnetic fields is demonstrated. For stronger fields, the stationary behavior of the correlation function is revealed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a600b178c9465419d176dfb3d94eca1 https://doi.org/10.1007/s11182-007-0043-2 Zobrazit plný text záznamu Plný text ve formátu PDF