PHASE-DIAGRAM OF THE GAUGE-INVARIANT 2 SPECIES ISING-MODEL

Authors
GONNELLA G STRAMAGLIA S
Citation
G. Gonnella et S. Stramaglia, PHASE-DIAGRAM OF THE GAUGE-INVARIANT 2 SPECIES ISING-MODEL, Modern physics letters B, 10(1-2), 1996, pp. 31-39
Citations number
27
Categorie Soggetti
Physics, Applied","Physics, Condensed Matter","Physycs, Mathematical
Journal title
Modern physics letters B → ACNP
ISSN journal
02179849
Volume
10
Issue
1-2
Year of publication
1996
Pages
31 - 39
Database
ISI
SICI code
0217-9849(1996)10:1-2<31:POTG2S>2.0.ZU;2-X
Abstract
We study the phase diagram of a Z(2) Higgs-gauge model with two specie s of Ising matter in D = 2 and D = 3. Differently from the case with o nly one Ising species, this model exhibits a transition also at zero g auge coupling. Loop expansions and mappings on the 8-vertex and the As hkin-Teller models are used to study the nature of the transitions in the extreme regions of the phase diagram. Relevant differences with re spect to the case of one species of Ising spins are found.