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Updated: Jun 3, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
Time-domain ab initio study of Auger and phonon-assisted auger processes in a semiconductor quantum dot
Kim Hyeon-Deuk1, Oleg V Prezhdo
1Department of Chemistry, Kyoto University, Kyoto, 606-8502, Japan. kim@kuchem.kyoto-u.ac.jp
Abstract:
We developed time-domain ab initio simulation of Auger phenomena, including multiple exciton generation (MEG) and recombination (MER). It is the first approach describing phonon-assisted processes and early dynamics. MEG starts below the electronic threshold, strongly accelerating with energy. Ligands are particularly important to phonon-assisted MEG, which therefore can be probed with infrared spectroscopy. Short-time gaussian component gives 5-10% of MEG, justifying rate theories that assume exponential dynamics. MER is preceded by electron-phonon relaxation to low energies.
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