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

Article

关键词: X-RAY-SCATTERING;    SUPEREXCHANGE INTERACTION;    MAGNETIC-PROPERTIES;    SPECTROSCOPY;   

DOI  :  10.1103/PhysRevB.89.041104

来源: SCIE

【 摘 要 】

We identify dd excitations in the quasi-one-dimensional compound Ca2Y2Cu5O10 using resonant inelastic x-ray scattering. By tuning across the Cu L-3 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.

【 授权许可】

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