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Updated: Jul 30, 2025

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
Ionization Induced Time Delay in Hole Dynamics in Molecules
Deep Mukherjee1, Upendra Harbola1
1Inorganic and Physical Chemistry Department, Indian Institute of Science, 560012 Bangalore, India.
Abstract:
Ionization time delay is a measure of the time of arrival of an electron from a bound molecular state to a free state. A similar time scale is associated with the hole dynamics in response to the ionization. We show that the ionization time delay and the time delay in hole dynamics are interdependent. Both time delays originate due to complex amplitudes of multiple ionization pathways, which lead to different cationic states. For sudden ionization (zero ionization time delay), the time delay for hole dynamics vanishes. We compute the ionization and hole dynamics time delays in glycine molecule and show how the photoionization process influences the hole dynamics and leads to nonzero hole-density flux as soon as the ionization takes place.
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