Disentangling the electronic and phononic glue in a high-Tc superconductor

S. Dal Conte, C. Giannetti, G. Coslovich, F. Cilento, D. Bossini, T. Abebaw, F. Banfi, G. Ferrini, H. Eisaki, M. Greven, A. Damascelli, D. Van Der Marel, F. Parmigiani

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130 Scopus citations

Abstract

Unveiling the nature of the bosonic excitations that mediate the formation of Cooper pairs is a key issue for understanding unconventional superconductivity. A fundamental step toward this goal would be to identify the relative weight of the electronic and phononic contributions to the overall frequency (Ω)-dependent bosonic function, Π(Ω). We performed optical spectroscopy on Bi2Sr2Ca0.92Y 0.08Cu2O8+δ crystals with simultaneous time and frequency resolution; this technique allowed us to disentangle the electronic and phononic contributions by their different temporal evolution. The spectral distribution of the electronic excitations and the strength of their interaction with fermionic quasiparticles fully account for the high critical temperature of the superconducting phase transition.

Original languageEnglish (US)
Pages (from-to)1600-1603
Number of pages4
JournalScience
Volume335
Issue number6076
DOIs
StatePublished - Mar 30 2012

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    Dal Conte, S., Giannetti, C., Coslovich, G., Cilento, F., Bossini, D., Abebaw, T., Banfi, F., Ferrini, G., Eisaki, H., Greven, M., Damascelli, A., Van Der Marel, D., & Parmigiani, F. (2012). Disentangling the electronic and phononic glue in a high-Tc superconductor. Science, 335(6076), 1600-1603. https://doi.org/10.1126/science.1216765