2-7 June 2019
Simon Fraser University
America/Vancouver timezone
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Photoinduced gap renormalization and many-body recombination in insulating cuprates

Jun 3, 2019, 11:15 AM
SWH 10081 (Simon Fraser University)

SWH 10081

Simon Fraser University

Oral (Non-Student) / Orale (non-étudiant(e)) Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) M1-11 Probing and controlling matter with light I (DCMMP) | Sonder et contrôler la matière avec de la lumière I (DPMCM)


Derek G. Sahota (Simon Fraser University) J. Steven Dodge (Simon Fraser University)


We study the pump-probe response of three insulating cuprates as a function of both pump and probe photon energies, time, and fluence. The fluence dependence follows a simple and universal analytical form that includes a characteristic volume scale, which we associate with the effective interaction volume for a photoexcitation. This characteristic size varies strongly with pump photon energy, with a maximum just above the charge-transfer absorption peak. We assign this behavior to ultrafast many-body recombination in the photocarrier kinetics, characterized by an anomalously large Auger coefficient.

Primary authors

Derek G. Sahota (Simon Fraser University) Ruixing Liang (University of British Columbia) Maxime Dion (Université de Sherbrooke) Patrick Fournier (Université de Sherbrooke) Hanna A. Dabkowska (McMaster University) Graeme M. Luke (McMaster University) J. Steven Dodge (Simon Fraser University)

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