Disentangling the Electronic and Phononic Glue in a High-Tc Superconductor

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

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

139 Citazioni (Scopus)

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 (Omega)-dependent bosonic function, Π(Ω). We performed optical spectroscopy on Y-Bi2212 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.
Lingua originaleEnglish
pagine (da-a)1600-1603
Numero di pagine4
RivistaSCIENCE
Volume335
DOI
Stato di pubblicazionePubblicato - 2012

Keywords

  • BI2SR2CACU2O8+DELTA
  • HIGH-TEMPERATURE SUPERCONDUCTORS

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