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arXiv · 1712.01095

Resonant inelastic x-ray scattering probes the electron-phonon coupling in the spin-liquid kappa-(BEDT-TTF)2Cu2(CN)3

V. Ilakovac·S. Carniato·P. Foury-Leylekian·S. Tomic·J. -P. Pouget·P. Lazic·Y. Joly·K. Miyagawa·K. Kanoda·A. Nicolaou
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Abstract

Resonant inelastic x-ray scattering at the N K edge reveals clearly resolved harmonics of the anion plane vibrations in the kappa-(BEDT-TTF)2Cu2(CN)3 spin-liquid insulator. Tuning the incoming light energy at the K edge of two distinct N sites permits to excite different sets of phonon modes. Cyanide CN stretching mode is selected at the edge of the ordered N sites which are more strongly connected to the BEDT-TTF molecules, while positionally disordered N sites show multi-mode excitation. Combining measurements with calculations on an anion plane cluster permits to estimate the sitedependent electron-phonon coupling of the modes related to nitrogen excitation.

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V. Ilakovac, S. Carniato, P. Foury-Leylekian, S. Tomic, J. -P. Pouget, P. Lazic, Y. Joly, K. Miyagawa, K. Kanoda, A. Nicolaou. 2017-10-06. Resonant inelastic x-ray scattering probes the electron-phonon coupling in the spin-liquid kappa-(BEDT-TTF)2Cu2(CN)3. https://doi.org/10.1103/physrevb.96.184303

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