GRIFFITHS-MCCOY SINGULARITIES IN THE TRANSVERSE FIELD ISING-MODEL ON THE RANDOMLY DILUTED SQUARE LATTICE

Authors
IKEGAMI T MIYASHITA S RIEGER H
Citation
T. Ikegami et al., GRIFFITHS-MCCOY SINGULARITIES IN THE TRANSVERSE FIELD ISING-MODEL ON THE RANDOMLY DILUTED SQUARE LATTICE, Journal of the Physical Society of Japan, 67(8), 1998, pp. 2671-2677
Citations number
30
Categorie Soggetti
Physics
Journal title
Journal of the Physical Society of Japan → ACNP
ISSN journal
00319015
Volume
67
Issue
8
Year of publication
1998
Pages
2671 - 2677
Database
ISI
SICI code
0031-9015(1998)67:8<2671:GSITTF>2.0.ZU;2-O
Abstract
The site-diluted transverse field Ising model in two dimensions is stu died with Quantum-Monte-Carlo simulations. Its phase diagram is determ ined in the transverse field (Gamma) and temperature (T) plane for var ious (fixed) concentrations (p). The nature of the quantum Griffiths p hase at zero temperature is investigated by calculating the distributi on of the local zero-frequency susceptibility. It is pointed out that the nature of the Griffiths phase is different for small and large Gam ma.