Vibrational spectrum of solid picene (C22H14)

Joseph, B.; Boeri, L.; Malavasi, L.; Capitani, F.; Artioli, G. A.; Protti, S.; Fagnoni, M.; Albini, A.; Marini, C.; Baldassarre, L.; Perucchi, A.; Lupi, S.; Postorino, P.; Dore, P.

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Vibrational spectrum of solid picene (C₂2H₁₄)

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Boeri, L.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Former Research Groups, Max Planck Institute for Solid State Research, Max Planck Society;
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Joseph, B., Boeri, L., Malavasi, L., Capitani, F., Artioli, G. A., Protti, S., et al. (2012). Vibrational spectrum of solid picene (C₂2H₁₄). Journal of Physics: Condensed Matter, 24(25): 252203.

Cite as: https://hdl.handle.net/21.11116/0000-000E-C33B-4

Abstract

Recently, Mitsuhashi et al observed superconductivity with a transition temperature up to 18 K in potassium doped picene (C22H14), a polycyclic aromatic hydrocarbon compound (Mitsuhashi et al 2010 Nature 464 76). Theoretical analysis indicates the importance of electron-phonon coupling in the superconducting mechanisms of these systems, with different emphasis on inter-and intra-molecular vibrations, depending on the approximations used. Here we present a combined experimental and ab initio study of the Raman and infrared spectrum of undoped solid picene, which allows us to unambiguously assign the vibrational modes. This combined study enables the identification of the modes which couple strongly to electrons and hence can play an important role in the superconducting properties of the doped samples.