Revealing the high-energy electronic excitations underlying the onset of high-temperature superconductivity in cuprates

Claudio Giannetti, Gabriele Ferrini, Federico Cilento, Stefano Dal Conte, Giacomo Coslovich, Fulvio Parmigiani, Hajo Molegraaf, Markus Raichle, Ruixing Liang, Hiroshi Eisaki, Martin Greven, Andrea Damascelli, Dirk Van Der Marel

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

75 Citazioni (Scopus)

Abstract

In strongly-correlated systems the electronic properties at the Fermi energy (EF) are intertwined with those at high energy scales. One of the pivotal challenges in the field of high-temperature superconductivity (HTSC) is to understand whether and how the high energy scale physics associated with Mott-like excitations (|E-EF|>1 eV) is involved in the condensate formation. Here we show the interplay between the many-body high-energy CuO2 excitations at 1.5 and 2 eV and the onset of HTSC. This is revealed by a novel optical pump supercontinuum-probe technique, which provides access to the dynamics of the dielectric function in Y-Bi2212 over an extended energy range, after the photoinduced suppression of the superconducting pairing. These results unveil an unconventional mechanism at the base of HTSC both below and above the optimal hole concentration required to attain the maximum critical temperature (Tc).
Lingua originaleEnglish
pagine (da-a)N/A-N/A
Numero di pagine353
RivistaNature Communications
Volume2011
DOI
Stato di pubblicazionePubblicato - 2011

Keywords

  • cuprates
  • interband transitions
  • spectral weight transfer
  • superconductors
  • ultrafast laser

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