Raman active high energy excitations in URu2Si2

被引：4

作者：

Buhot, Jonathan ^{[1
,2
]}

Gallais, Yann ^{[1
]}

Cazayous, Maximilien ^{[1
]}

Sacuto, Alain ^{[1
]}

Piekarz, Przemyslaw ^{[3
]}

Lapertot, Gerard ^{[4
,5
]}

Aoki, Dai ^{[4
,5
,6
]}

Measson, Marie-Aude ^{[1
]}

机构：

[1] Univ Paris Diderot Paris 7, CNRS, UMR 7162, Lab Mat & Phenomenes Quant, Bat Condorcet, F-75205 Paris 13, France

[2] Radboud Univ Nijmegen, Inst Mol & Mat, High Field Magnet Lab HFML EMFL, Toernooiveld 7, NL-6525 ED Nijmegen, Netherlands

[3] Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland

[4] Univ Grenoble Alpes, INAC SPSMS, F-38000 Grenoble, France

[5] CEA, INAC SPSMS, F-38000 Grenoble, France

[6] Tohoku Univ, Inst Mat Res, Oarai, Ibaraki 3111313, Japan

来源：

PHYSICA B-CONDENSED MATTER | 2017年 / 506卷

关键词：

Heavy fermions; Exotic electronic order; URu2Si2; Hidden order; Raman spectroscopy; Crystal electric field (CEF); HIDDEN ORDER; SCATTERING; LIGHT;

D O I：

10.1016/j.physb.2016.10.034

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have performed Raman scattering measurements on URu2Si2 single crystals on a large energy range up to similar to 1300 cm(-1) and in all the Raman active symmetries as a function of temperature down to 15 K. A large excitation, active only in the Eg symmetry, is reported. It has been assigned to a crystal electric field excitation on the Uranium site. We discuss how this constrains the crystal electric field scheme of the Uranium ions. Furthermore, three excitations in the A(1g) symmetry are observed. They have been associated to double Raman phonon processes consistently with ab initio calculations of the phonons dispersion.

引用

页码：19 / 22

页数：4

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