Mixed spin-1/2 and spin-1 Ising model in transverse random fields

Authors
Benayad, N Zerhouni, R Klumper, A Zittartz, J
Citation
N. Benayad et al., Mixed spin-1/2 and spin-1 Ising model in transverse random fields, PHYSICA A, 262(3-4), 1999, pp. 483-495
Citations number
55
Categorie Soggetti
Physics
Journal title
PHYSICA A
ISSN journal
03784371 → ACNP
Volume
262
Issue
3-4
Year of publication
1999
Pages
483 - 495
Database
ISI
SICI code
0378-4371(19990115)262:3-4<483:MSASIM>2.0.ZU;2-L
Abstract
We investigate the critical properties of a mixed spin-1/2 sand spin-1 Isin g model in a transverse random field. In this study, we use two approaches: the pair approximation and the mean field renormalization group each combi ned with the discretized path integral representation. It is found that bot h methods predict quantitatively the same phase diagram. Critical exponents of the system are also calculated. (C) 1999 Elsevier Science B.V. All righ ts reserved.