Journal
EPL
Volume 89, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1209/0295-5075/89/57006
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Funding
- NFS [DMR-0746395]
- Alfred P. Sloan fellowship
- NSF [DMR-0906943]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0906943] Funding Source: National Science Foundation
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We develop a Landau-Ginzburg theory of the hidden-order phase and the local moment antiferromagnetic phase of URu2Si2. We unify the two broken symmetries in a common complex-order parameter and derive many experimentally relevant consequences such as the topology of the phase diagram in magnetic field and pressure. The theory accounts for the appearance of a moment under application of stress and the thermal expansion anomaly across the phase transitions. It identifies the low-energy mode which is seen in the hidden-order phase near the commensurate wave vector (0, 0, 1) as the pseudo-Goldstone mode of the approximate U(1) symmetry. Copyright (C) EPLA, 2010
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