Singlet Magnetism in Heavy Fermions
Condensed Matter
2009-10-28 v1
Abstract
We consider singlet magnetism for the uranium ions in UPt and URuSi assuming that time-reversal symmetry is broken for the {\em coherent state of intermediate valence}. The relative weight of the two involved configurations should be different for UPt and URuSi. If in UPt the configuration on the U-ion prevails in the coherent state below the magnetic transition, the magnetic moment would vanish for the particular choice of the {\em ionic} wave function. In case of URuSi, the phase transition is non-magnetic in the first approximation -- the magnetic moment arises from a small admixture of a half-integer spin configuration.
Cite
@article{arxiv.cond-mat/9505091,
title = {Singlet Magnetism in Heavy Fermions},
author = {Victor Barzykin and Lev P. Gor'kov},
journal= {arXiv preprint arXiv:cond-mat/9505091},
year = {2009}
}
Comments
12 pages, RevTex, no figures; Phys. Rev. Lett., to appear