2026-07-18T16:47:21Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/519322023-08-28T19:55:29Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Carmona, J. M. author Cruz, A. author Fernández Pérez, Luis Antonio author Jiménez, S. author Martín Mayor, Víctor author Muñoz Sudupe, Antonio author Pech, J. author Ruiz Lorenzo, J. J. author Tarancón, A. author Téllez, P. author 2003-05-08 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. 0370-2693 10.1016/S0370-2693(03)00382-4 https://hdl.handle.net/20.500.14352/51932 http://doi.org/10.1016/S0370-2693(03)00382-4 http://www.sciencedirect.com/ Dynamical generation of a gauge symmetry in the double-exchange model