Temperature-pressure phase diagram of URu2Si2 from resistivity measurements and ac calorimetry:: Hidden order and Fermi-surface nesting

被引：124

作者：

Hassinger, E. ^{[1
]}

Knebel, G. ^{[1
]}

Izawa, K. ^{[1
]}

Lejay, P. ^{[1
]}

Salce, B. ^{[1
]}

Flouquet, J. ^{[1
]}

机构：

[1] CEA Grenoble, SPSMS, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.77.115117

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By performing combined resistivity and calorimetric experiments under pressure, we have determined a precise temperature-pressure (T,P) phase diagram of the heavy fermion compound URu2Si2. It will be compared with previous diagrams determined by elastic neutron diffraction and strain gauge techniques. At first glance, the low-pressure ordered phase referred to as hidden order is dominated by Fermi-surface nesting, which has strong consequences on the localized spin dynamics. The high-pressure phase is dominated by large moment antiferromagnetism (LMAF) coexisting with at least dynamical nesting needed to restore on cooling a local moment behavior. ac calorimetry confirms unambiguously that bulk superconductivity does not coexist with LMAF. URu2Si2 is one of the most spectacular examples of the dual itinerant and local character of uranium-based heavy fermion compounds.

引用

页数：9

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