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

被引：51
|
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.
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收藏
页数：5
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