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arXiv · 1912.01604

Many-body recombination in insulating cuprates

Derek G. Sahota·Ruixing Liang·M. Dion·Patrick Fournier·Hanna A. Dąbkowska·Graeme M. Luke·J. Steven Dodge
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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.

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Derek G. Sahota, Ruixing Liang, M. Dion, Patrick Fournier, Hanna A. Dąbkowska, Graeme M. Luke, J. Steven Dodge. 2019-12-03. Many-body recombination in insulating cuprates. https://doi.org/10.1103/physrevresearch.1.033214

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