Witnessing the formation and relaxation of dressed quasi-particles in a strongly correlated electron system

Claudio Giannetti, F. Cilento, G. Coslovich, H. Eisaki, M. K. Chan, C. J. Dorow, M. J. Veit, M. Greven, D. Van Der Marel, R. Comin, A. Damascelli, L. Rettig, U. Bovensiepen, M. Capone, F. Parmigiani

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

31 Citazioni (Scopus)

Abstract

The non-equilibrium approach to correlated electron systems is often based on the paradigm that different degrees of freedom interact on different timescales. In this context, photo-excitation is treated as an impulsive injection of electronic energy that is transferred to other degrees of freedom only at later times. Here, by studying the ultrafast dynamics of quasi-particles in an archetypal strongly correlated charge-transfer insulator (La2CuO4+δ), we show that the interaction between electrons and bosons manifests itself directly in the photo-excitation processes of a correlated material. With the aid of a general theoretical framework (Hubbard–Holstein Hamiltonian), we reveal that sub-gap excitation pilots the formation of itinerant quasi-particles, which are suddenly dressed by an ultrafast reaction of the bosonic field.
Lingua originaleEnglish
pagine (da-a)N/A-N/A
RivistaNature Communications
Volume5
DOI
Stato di pubblicazionePubblicato - 2014

Keywords

  • correlated materials

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