Many-body recombination in insulating cuprates
arXiv:1912.01604 · doi:10.1103/PhysRevResearch.1.033214
Abstract
We study the pump-probe response of three insulating cuprates and develop a model for its recombination kinetics. The dependence on time, fluence, and both pump and probe photon energies imply many-body recombination on femtosecond timescales, characterized by anomalously large trapping and Auger coefficients. The fluence dependence follows a universal form that includes a characteristic volume scale, which we associate with the holon-doublon excitation efficiency. This volume varies strongly with pump photon energy and peaks near twice the charge-transfer energy, suggesting that the variation is caused by carrier multiplication through impact ionization.
References in corpus (6)
- Electrodynamics of Correlated Electron Materials
- Photo-induced states in a Mott insulator
- Witnessing the formation and relaxation of massive quasi-particles in a strongly correlated electron system
- Role of impact ionization in the thermalization of photo-excited Mott insulators
- Charge Recombination in Undoped Cuprates
- Optoelectronic excitations and photovoltaic effect in strongly correlated materials