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Spin ice under pressure: symmetry enhancement and infinite order multicriticality.

Abstract:
We study the low-temperature behavior of spin ice when uniaxial pressure induces a tetragonal distortion. There is a phase transition between a Coulomb liquid and a fully magnetized 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 realization.
Publication status:
Published

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
Journal:
Physical Review Letters More from this journal
Volume:
105
Issue:
8
Pages:
087201
Publication date:
2010-08-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Language:
English
Keywords:
Pubs id:
pubs:71206
UUID:
uuid:1e4d53a3-c617-402e-8915-7441beb0e5d1
Local pid:
pubs:71206
Source identifiers:
71206
Deposit date:
2012-12-19

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