Orbital excitations in YTiO3 and LaTiO3 probed by resonant inelastic soft x-ray scattering

C. Ulrich, G. Ghiringhelli, A. Piazzalunga, L. Braicovich, N. B. Brookes, H. Roth, T. Lorenz, and B. Keimer
Phys. Rev. B 77, 113102 – Published 6 March 2008

Abstract

We have performed resonant inelastic x-ray scattering (RIXS) experiments at the L23 edge (2p3d) of the Mott insulators LaTiO3 and YTiO3. Pronounced electronic excitations are observed at an energy of 0.25eV in both materials. These modes had been assigned to orbital excitations based on prior optical Raman scattering experiments. The present RIXS experiment strongly supports the Ti3d orbital character of the excitations and confirms the great potential of high resolution soft x-ray RIXS as a probe of electronic excitations in complex materials.

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  • Received 27 July 2007

DOI:https://doi.org/10.1103/PhysRevB.77.113102

©2008 American Physical Society

Authors & Affiliations

C. Ulrich1, G. Ghiringhelli2, A. Piazzalunga3, L. Braicovich3, N. B. Brookes4, H. Roth5, T. Lorenz5, and B. Keimer1

  • 1Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
  • 2CNR/INFM COHERENTIA and Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
  • 3CNR/INFM and Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
  • 4European Synchrotron Radiation Facility, Boîte Postale 220, 38043 Grenoble, France
  • 5II. Physikalisches Institut, Universität zu Köln, 50937 Köln, Germany

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Issue

Vol. 77, Iss. 11 — 15 March 2008

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