| Texto completo | |
| Autor(es): |
Granato, Enzo
Número total de Autores: 1
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| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW B; v. 85, n. 5, p. 7-pg., 2012-02-22. |
| Resumo | |
Phase coherence and vortex order in the fully frustrated XY model on a two-dimensional honeycomb lattice are studied by extensive Monte Carlo simulations using the parallel tempering method and finite-size scaling. No evidence is found for an equilibrium order-disorder or a spin/vortex-glass transition, suggested in previous simulation works. Instead, the scaling analysis of correlations of phase and vortex variables in the full equilibrated system is consistent with a phase transition where the critical temperature vanishes and the correlation lengths diverge as a power law with decreasing temperatures and corresponding critical exponents nu(ph) and nu(upsilon).This behavior and the near agreement of the critical exponents suggest a zero-temperature transition scenario where phase and vortex variables remain coupled on large length scales. (AU) | |
| Processo FAPESP: | 07/08492-9 - Dinâmica, defeitos topológicos e transições de fase em meios ordenados |
| Beneficiário: | Enzo Granato |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |