Complex Landau-Ginzburg theory of the hidden order in URu2Si2

被引：39

作者：

Haule, K. ^{[1
]}

Kotliar, G. ^{[1
]}

机构：

[1] Rutgers State Univ, Dept Phys, Piscataway, NJ 08854 USA

来源：

EPL | 2010年 / 89卷 / 05期

基金：

美国国家科学基金会;

关键词：

FERMION SUPERCONDUCTOR URU2SI2; MAGNETIC EXCITATIONS; HEAVY; SYSTEMS;

D O I：

10.1209/0295-5075/89/57006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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

引用

页数：6

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