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

Abstract

The non-equilibrium semiconductors physics is based on the paradigm that different degrees of freedom interact on different timescales. In this context the photo-excitation is often 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 particles dynamics in a archetypal strongly correlated charge-transfer insulator (La2CuO4), we show that the interaction between electrons and bosons manifest 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 suddently dressed (<100 fs) by an ultrafast reaction of the bosonic field.

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Cited by in corpus (13)

• Snapshots of the retarded interaction of charge carriers with ultrafast fluctuations in cuprates
• Interaction quench in the Holstein model: Thermalization crossover from electron- to phonon-dominated relaxation
• Ultrafast evolution and transient phases of the prototype out-of-equilibrium Mott-Hubbard material V2O3
• Real-time decay of a highly excited charge carrier in the one-dimensional Holstein model
• Field-induced polaron formation in the Holstein-Hubbard model
• Crossover from Super- to Sub-Diffusive Motion and Memory Effects in Crystalline Organic Semiconductors
• Coexistence of excited polarons and metastable delocalized states in photo-induced metals
• Photo-enhanced excitonic correlations in a Mott insulator with nonlocal interactions
• Photoinduced absorptions inside the Mott gap in the two-dimensional extended Hubbard model
• Disorder-sensitive pump-probe measurements on Nd${}_{1.83}$Ce${}_{0.17}$CuO${}_{4\pm \delta }$ films
• Nature of Bosonic Excitations revealed by high-energy charge carriers
• Many-body recombination in insulating cuprates
• Dissipative dynamics of a driven qubit: interplay between non-adiabatic dynamics and noise effects from weak to strong coupling regime