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Charge-orbital-lattice coupling effects in the dd excitation profile of one-dimensional cuprates

J. J. Lee, B. Moritz, W. S. Lee, M. Yi, C. J. Jia, A. P. Sorini, K. Kudo, Y. Koike, K. J. Zhou, C. Monney, V. Strocov, L. Patthey, T. Schmitt, T. P. Devereaux, and Z. X. Shen
Phys. Rev. B 89, 041104(R) – Published 9 January 2014

Abstract

We identify dd excitations in the quasi-one-dimensional compound Ca2Y2Cu5O10 using resonant inelastic x-ray scattering. By tuning across the Cu L3 edge, we observe abrupt shifts in the dd-peak positions as a function of incident photon energy. This observation demonstrates orbital-specific coupling of the high-energy excited states of the system to the low-energy degrees of freedom. A Franck-Condon treatment of electron-lattice coupling, consistent with other measurements in this compound, reproduces these shifts, explains the Gaussian line shapes, and highlights charge-orbital-lattice renormalization in the high-energy d manifold.

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  • Received 20 November 2013
  • Revised 9 December 2013

DOI:https://doi.org/10.1103/PhysRevB.89.041104

©2014 American Physical Society

Authors & Affiliations

J. J. Lee1,2, B. Moritz1,3,4, W. S. Lee1,2, M. Yi1,2, C. J. Jia1, A. P. Sorini1, K. Kudo5, Y. Koike6, K. J. Zhou7, C. Monney7,8, V. Strocov7, L. Patthey7, T. Schmitt7, T. P. Devereaux1,2, and Z. X. Shen1,2

  • 1Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
  • 2Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
  • 3Department of Physics and Astrophysics, University of North Dakota, Grand Forks, North Dakota 58202, USA
  • 4Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA
  • 5Department of Physics, Okayama University, Okayama 700-8530, Japan
  • 6Department of Applied Physics, Tohoku University, Sendai, Japan
  • 7SLS, Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland
  • 8Fritz-Haber-Institut der Max Planck Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany

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Vol. 89, Iss. 4 — 15 January 2014

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