Why the Hidden Order in URu2Si2 Is Still Hidden-One Simple Answer

被引：89

作者：

Harima, Hisatomo ^{[1
,2
,3
]}

Miyake, Kazumasa ^{[2
,3
,4
]}

Flouquet, Jacques ^{[2
,3
]}

机构：

[1] Kobe Univ, Grad Sch Sci, Dept Phys, Kobe, Hyogo 6578501, Japan

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

[3] Univ Grenoble 1, F-38054 Grenoble, France

[4] Osaka Univ, Graduated Sch Engn Sci, Dept Mat Engn Sci, Div Mat Phys, Osaka 5608531, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2010年 / 79卷 / 03期

关键词：

URu2Si2; hidden order; quadrupole ordering; Kondo effect; ELECTRON SUPERCONDUCTOR URU2SI2; FERMI-SURFACE; HEAVY; 1T-TASE2; SYSTEM; PHASE;

D O I：

10.1143/JPSJ.79.033705

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

For more than two decades, the nonmagnetic anomaly observed around 17.5K in URu2Si2, has been investigated intensively. However, any kind of fingerprint for the lattice anomaly has not been observed in the low-temperature ordered phase. Therefore, the order has been called "the hidden order''. One simple answer to why the hidden order is still hidden is presented from the space group analysis. The second-order phase transition from I4/mmm (No. 139) to P4(2)/mnm (No. 136) does not require any kind of lattice distortion in this system and allows the NQR frequency at a Ru site unchanged. It is compatible with O-xy-type antiferro-quadrupole ordering with Q=(0,0,1). The characteristics of the hidden order are discussed based on the local 5f(2) electron picture.

引用

页数：4

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