Pressure-Induced Magnetism and Hidden Order in URu_2Si_2
Strongly Correlated Electrons
2009-11-07 v1
Abstract
We discuss the discovery of pressure-induced antiferromagnetism in URu_2Si_2, in the context of neutron, NMR and \mu SR results. The identification of a critical pressure separating mean-field and Ising phase transitions leads us to propose that the system lies close to a bicritical point associated with magnetic and (non-magnetic) hidden order. We conclude that the recent observation of an isotropic, field-independent component in the silicon NMR line-width implies that the hidden order parameter breaks time-reversal invariance and present a preliminary discussion of the underlying nature of the hidden order parameter.
Keywords
Cite
@article{arxiv.cond-mat/0110048,
title = {Pressure-Induced Magnetism and Hidden Order in URu_2Si_2},
author = {P. Chandra and P. Coleman and J. A. Mydosh},
journal= {arXiv preprint arXiv:cond-mat/0110048},
year = {2009}
}
Comments
To appear in proceedings of SCES 2001