Spin-orbit coupling in the Mott insulator Ca2RuO4 -: art. no. 077202

被引：177

作者：

Mizokawa, T ^{[1
]}

Tjeng, LH

Sawatzky, GA

Ghiringhelli, G

Tjernberg, O

Brookes, NB

Fukazawa, H

Nakatsuji, S

Maeno, Y

机构：

[1] Univ Tokyo, Dept Complex Sci & Engn, Tokyo 1130033, Japan

[2] Univ Groningen, Ctr Mat Sci, NL-9747 AG Groningen, Netherlands

[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[4] Politecn Milan, INFM, Dipartimento Fis, S-10044 Stockholm, Sweden

[5] KTH, S-10044 Stockholm, Sweden

[6] Kyoto Univ, Kyoto 6068502, Japan

[7] Japan Sci & Technol Corp, CREST, Kawaguchi, Saitama 3320012, Japan

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.87.077202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

O 1s x-ray absorption study of the Mott insulator Ca2RuO4 shows that the orbital population of the 4d t(2g) band dramatically changes with temperature. In addition, spin-resolved circularly polarized photoemission study of Ca2RuO4 shows that a substantial orbital angular momentum is induced in the Ru 4d t(2g) band. Based on the experimental results and model Hartree-Fock calculations, we argue that the cooperation between the strong spin-orbit coupling in the Ru 4d t(2g) band and the small distortion of the RuO6 octahedra causes the interesting changeover of the spin and orbital anisotropy as a function of temperature.

引用

页码：77202 / 1

页数：4

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