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

Lee, J. J.; Moritz, B.; Lee, W. S.; Yi, M.; Jia, C. J.; Sorini, A. P.; Kudo, K.; Koike, Y.; Zhou, K. J.; Monney, Claude; Strocov, V.; Patthey, L.; Schmitt, T.; Devereaux, T. P.; Shen, Z. X.

doi:10.1103/PhysRevB.89.041104

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

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Monney, Claude
Physical Chemistry, Fritz Haber Institute, Max Planck Society;
SLS, Paul Scherrer Institute;

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Citation

Lee, J. J., Moritz, B., Lee, W. S., Yi, M., Jia, C. J., Sorini, A. P., et al. (2014). Charge-orbital-lattice coupling effects in the dd excitation profile of one-dimensional cuprates. Physical Review B, 89(4): 041104(R). doi:10.1103/PhysRevB.89.041104.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0015-874D-0

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.