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

C. G. Fatuzzo, M. Dantz, S. Fatale, P. Olalde-Velasco, N. E. Shaik, B. Dalla Piazza, S. Toth, J. Pelliciari, R. Fittipaldi, A. Vecchione, N. Kikugawa, J. S. Brooks, H. M. Rønnow, M. Grioni, Ch. Rüegg, T. Schmitt, and J. Chang
Phys. Rev. B 91, 155104 – Published 6 April 2015

Abstract

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 λso=200 meV. The effects of spin-orbit interaction on the electronic structure and implications for the Mott and superconducting ground states of (Ca,Sr)2RuO4 are discussed.

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  • Received 19 December 2014
  • Revised 2 March 2015
  • Corrected 5 May 2015

DOI:https://doi.org/10.1103/PhysRevB.91.155104

©2015 American Physical Society

Corrections

5 May 2015

Erratum

Publisher's Note: Spin-orbit-induced orbital excitations in Sr2RuO4 and Ca2RuO4: A resonant inelastic x-ray scattering study [Phys. Rev. B 91, 155104 (2015)]

C. G. Fatuzzo, M. Dantz, S. Fatale, P. Olalde-Velasco, N. E. Shaik, B. Dalla Piazza, S. Toth, J. Pelliciari, R. Fittipaldi, A. Vecchione, N. Kikugawa, J. S. Brooks, H. M. Rønnow, M. Grioni, Ch. Rüegg, T. Schmitt, and J. Chang
Phys. Rev. B 91, 199904 (2015)

Authors & Affiliations

C. G. Fatuzzo1, M. Dantz2, S. Fatale1, P. Olalde-Velasco2, N. E. Shaik1, B. Dalla Piazza1, S. Toth3, J. Pelliciari2, R. Fittipaldi4,5, A. Vecchione4,5, N. Kikugawa6,7, J. S. Brooks7, H. M. Rønnow1,8, M. Grioni1, Ch. Rüegg3,9, T. Schmitt2, and J. Chang1,10

  • 1Institute for Condensed Matter Physics, École Polytechnique Fedérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
  • 2Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
  • 3Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
  • 4CNR-SPIN, I-84084 Fisciano, Salerno, Italy
  • 5Dipartimento di Fisica “E.R. Caianiello”, Università di Salerno, I-84084 Fisciano, Salerno, Italy
  • 6National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, 305-0047, Japan
  • 7National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA
  • 8Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
  • 9Department of Quantum Matter Physics, University of Geneva, CH-12111 Geneva, Switzerland
  • 10Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland

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Vol. 91, Iss. 15 — 15 April 2015

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