Abstract : We study the low-temperature behaviour of spin ice when uniaxial pressure induces a tetragonal distortion. There is a phase transition between a Coulomb liquid and a fully magnetised phase. Unusually, it combines features of discontinuous and continuous transitions: the order parameter exhibits a jump, but this is accompanied by a divergent susceptibility and vanishing domain wall tension. All these aspects can be understood as a consequence of an emergent SU(2) symmetry at the critical point. We map out a possible experimental realisation.
https://hal-ens-lyon.archives-ouvertes.fr/ensl-00462955
Contributeur : Ludovic Jaubert
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Soumis le : mercredi 10 mars 2010 - 16:10:18
Dernière modification le : samedi 22 septembre 2018 - 08:36:01
Document(s) archivé(s) le : jeudi 30 juin 2011 - 12:11:03
