Many-body recombination in insulating cuprates
Strongly Correlated Electrons
2020-01-08 v1 Superconductivity
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.
Cite
@article{arxiv.1912.01604,
title = {Many-body recombination in insulating cuprates},
author = {Derek G. Sahota and Ruixing Liang and M. Dion and Patrick Fournier and Hanna A. Dąbkowska and Graeme M. Luke and J. Steven Dodge},
journal= {arXiv preprint arXiv:1912.01604},
year = {2020}
}