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Related Experiment Video

Updated: Jul 16, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Tracing ultrafast interatomic electronic decay processes in real time and space.

Alexander I Kuleff¹, Lorenz S Cederbaum

¹Theoretische Chemie, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany. alexander.kuleff@pci.uni-heidelberg.de

Physical Review Letters

|March 16, 2007

Summary

Ultrafast electronic processes, like interatomic Coulombic decay (ICD), are visualized in real-time using advanced laser techniques. New computational methods fully trace electron dynamics during ICD, revealing attosecond-scale responses.

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Direct Imaging of Laser-driven Ultrafast Molecular Rotation

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Area of Science:

Quantum mechanics
Atomic and molecular physics
Ultrafast spectroscopy

Background:

Laser pump-probe techniques enable real-time observation of ultrafast electronic processes.
Interatomic Coulombic decay (ICD) is a natural phenomenon involving energy transfer between atoms.
Visualizing interatomic energy transfer is crucial for understanding complex electronic dynamics.

Purpose of the Study:

To computationally simulate and visualize the electron dynamics during Interatomic Coulombic Decay (ICD).
To analyze the real-time and spatial evolution of the electronic cloud during ICD.
To investigate the time scale of ICD, particularly in the attosecond regime.

Main Methods:

Utilizing a wave packet propagation method for fully ab initio calculations.
Accounting for all electrons and their correlations within the system.
Simulating the ICD process in NeAr following Ne2s ionization.

Main Results:

The study successfully computed and analyzed the electron cloud's evolution during ICD.
The process was observed to occur on a femtosecond timescale.
A significant electronic response was detected within the attosecond timescale.

Conclusions:

Wave packet propagation enables detailed, real-time tracing of electron dynamics in ICD.
ICD processes exhibit complex behavior on both femtosecond and attosecond timescales.
This research provides new insights into fundamental electronic processes in atoms and molecules.