Similarity of the Fermi Surface in the Hidden Order State and in the Antiferromagnetic State of URu2Si2

被引：115

作者：

Hassinger, E. ^{[1
]}

Knebel, G. ^{[1
]}

Matsuda, T. D. ^{[1
,2
]}

Aoki, D. ^{[1
]}

Taufour, V. ^{[1
]}

Flouquet, J. ^{[1
]}

机构：

[1] CEA, SPSMS, INAC, F-38054 Grenoble, France

[2] Japan Atom Energy Agcy, ASRC, Naka, Ibaraki 3191195, Japan

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 21期

关键词：

ELECTRON SUPERCONDUCTOR URU2SI2; SYSTEM URU2SI2; PRESSURE; TRANSITION; LATTICE;

D O I：

10.1103/PhysRevLett.105.216409

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Shubnikov-de Haas measurements of high quality URu2Si2 single crystals reveal two previously unobserved Fermi surface branches in the so-called hidden order phase. Therefore, about 55% of the enhanced mass is now detected. Under pressure in the antiferromagnetic state, the Shubnikov-de Haas frequencies for magnetic fields applied along the crystalline c axis show little change compared with the zero pressure data. This implies a similar Fermi surface in both the hidden order and antiferromagnetic states, which strongly suggests that the lattice doubling in the antiferromagnetic phase due to the ordering vector Q(AF) = (001) already occurs in the hidden order. These measurements provide a good test for existing or future theories of the hidden order parameter.

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页数：4

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