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Quasi-long-range order in the 2D XY model with random phase shifts

Alba, Vincenzo and Pelissetto, Andrea and Vicari, Ettore (2009) Quasi-long-range order in the 2D XY model with random phase shifts. Journal of Physics A: Mathematical and General, 42 . p. 295001. ISSN 1361-6447

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We study the square-lattice XY model in the presence of random phase shifts. We consider two different disorder distributions with zero average shift and investigate the low-temperature quasi-long-range order phase which occurs for sufficiently low disorder. By means of Monte Carlo simulations we determine several universal quantities which are then compared with the analytic predictions of the random spin-wave theory. We observe a very good agreement which indicates that the universal long-distance behavior in the whole low-disorder low-temperature phase is fully described by the random spin-wave theory.

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 16:00
Last Modified: 09 Apr 2015 16:00
URI: http://eprints.adm.unipi.it/id/eprint/1849

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