A FIELD-THEORY FOR FINITE-DIMENSIONAL SITE-DISORDERED SPIN SYSTEMS

Authors
DEAN DS LANCASTER D
Citation
Ds. Dean et D. Lancaster, A FIELD-THEORY FOR FINITE-DIMENSIONAL SITE-DISORDERED SPIN SYSTEMS, Physical review letters, 77(14), 1996, pp. 3037-3040
Citations number
15
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
77
Issue
14
Year of publication
1996
Pages
3037 - 3040
Database
ISI
SICI code
0031-9007(1996)77:14<3037:AFFFSS>2.0.ZU;2-8
Abstract
We present a new field theoretic approach for finite-dimensional site- disordered spin systems by introducing the notion of grand canonical d isorder, where the number of spins in the system is random but quenche d. We perform the simplest nontrivial analysis of this field theory by using the variational replica formalism. We explicitly discuss a thre e-dimensional RKKY-like system where we find a spin glass phase with c ontinuous replica symmetry breaking.