| Full text | |
| Author(s): |
Granato, Enzo
Total Authors: 1
|
| Document type: | Journal article |
| Source: | PHYSICAL REVIEW B; v. 85, n. 5, p. 7-pg., 2012-02-22. |
| Abstract | |
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) | |
| FAPESP's process: | 07/08492-9 - Dynamics, topological defects and phase transitions in ordered media |
| Grantee: | Enzo Granato |
| Support Opportunities: | Research Projects - Thematic Grants |