Spin-orbit-induced orbital excitations in Sr2RuO4 and Ca2RuO4: A resonant inelastic x-ray scattering study

被引：53

作者：

Fatuzzo, C. G. ^{[1
]}

Dantz, M. ^{[2
]}

Fatale, S. ^{[1
]}

Olalde-Velasco, P. ^{[2
]}

Shaik, N. E. ^{[1
]}

Piazza, B. Dalla ^{[1
]}

Toth, S. ^{[3
]}

Pelliciari, J. ^{[2
]}

Fittipaldi, R. ^{[4
,5
]}

Vecchione, A. ^{[4
,5
]}

Kikugawa, N. ^{[6
,7
]}

Brooks, J. S. ^{[7
]}

Ronnow, H. M. ^{[1
,8
]}

Grioni, M. ^{[1
]}

Rueegg, Ch. ^{[3
,9
]}

Schmitt, T. ^{[2
]}

Chang, J. ^{[1
,10
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Condensed Matter Phys, CH-1015 Lausanne, Switzerland

[2] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland

[3] Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, Switzerland

[4] CNR SPIN, I-84084 Salerno, Italy

[5] Univ Salerno, Dipartimento Fis ER Caianiello, I-84084 Salerno, Italy

[6] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[7] Nat High Magnet Field Lab, Tallahassee, FL 32310 USA

[8] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[9] Univ Geneva, Dept Quantum Matter Phys, CH-12111 Geneva, Switzerland

[10] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

来源：

PHYSICAL REVIEW B | 2015年 / 91卷 / 15期

基金：

瑞士国家科学基金会;

关键词：

SUPERCONDUCTIVITY; TRANSITION; TRIPLET;

D O I：

10.1103/PhysRevB.91.155104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-resolution resonant inelastic x-ray scattering (RIXS) at the oxygen K edge has been used to study the orbital excitations of Ca2RuO4 and Sr2RuO4. In combination with linear dichroism x-ray absorption spectroscopy, the ruthenium 4d-orbital occupation and excitations were probed through their hybridization with the oxygen p orbitals. These results are described within a minimal model, taking into account crystal field splitting and a spin-orbit coupling lambda(so) = 200 meV. The effects of spin-orbit interaction on the electronic structure and implications for the Mott and superconducting ground states of (Ca,Sr)(2)RuO4 are discussed.

引用

页数：5

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