Dynamical generation of a gauge symmetry in the Double-Exchange model
High Energy Physics - Lattice
2009-11-10 v2 Condensed Matter
Abstract
It is shown that a bosonic formulation of the double-exchange model, one of the classical models for magnetism, generates dynamically a gauge-invariant phase in a finite region of the phase diagram. We use analytical methods, Monte Carlo simulations and Finite-Size Scaling analysis. We study the transition line between that region and the paramagnetic phase. The numerical results show that this transition line belongs to the Universality Class of the Antiferromagnetic RP(2) model. The fact that one can define a Universality Class for the Antiferromagnetic RP(2) model, different from the one of the O(N) models, is puzzling and somehow contradicts naive expectations about Universality.
Keywords
Cite
@article{arxiv.hep-lat/0301004,
title = {Dynamical generation of a gauge symmetry in the Double-Exchange model},
author = {J. M. Carmona and A. Cruz and L. A. Fernandez and S. Jimenez and V. Martin-Mayor and A. Munoz-Sudupe and J. Pech and J. J. Ruiz-Lorenzo and A. Tarancon and P. Tellez},
journal= {arXiv preprint arXiv:hep-lat/0301004},
year = {2009}
}
Comments
13 pages, 3 figures