Università di Pisa
Sistema bibliotecario di ateneo

Transitions and crossover phenomena in fully frustrated XY systems

Hasenbusch, Martin and Pelissetto, Andrea and Vicari, Ettore (2005) Transitions and crossover phenomena in fully frustrated XY systems. Physical review. B, Condensed matter and materials physics, 72 . p. 184502. ISSN 1550-235X

Full text not available from this repository.


We study the two-dimensional fully frustrated XY (FFXY) model and two related models, a discretization of the Landau-Ginzburg-Wilson Hamiltonian for the critical modes of the FFXY model and a coupled Ising-XY model, by means of Monte Carlo simulations on square lattices L x L, L=O(10^3). We show that their phase diagram is characterized by two very close chiral and spin transitions, at T_ch > T_sp respectively, of the Ising and Kosterlitz-Thouless type. At T_ch the Ising regime sets in only after a preasymptotic regime, which appears universal to some extent. The approach is nonmonotonic for most observables, with a wide region controlled by an effective exponent nu_eff=0.8.

Item Type: Article
Additional Information: Imported from arXiv
Subjects: Area02 - Scienze fisiche > FIS/02 - Fisica teorica, modelli e metodi matematici
Divisions: Dipartimenti (until 2012) > DIPARTIMENTO DI FISICA " E. FERMI"
Depositing User: dott.ssa Sandra Faita
Date Deposited: 09 Apr 2015 15:31
Last Modified: 09 Apr 2015 15:31
URI: http://eprints.adm.unipi.it/id/eprint/1804

Repository staff only actions

View Item