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Dynamics of interatomic Coulombic decay in quantum dots.

Annika Bande1, Kirill Gokhberg, Lorenz S Cederbaum

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Interatomic Coulombic decay (ICD) is demonstrated in general binding potentials, not just atoms and molecules. This ultrafast electron process shows potential applications in quantum dot technology.

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Area of Science:

  • Atomic and Molecular Physics
  • Quantum Chemistry
  • Condensed Matter Physics

Background:

  • Interatomic Coulombic decay (ICD) is a known ultrafast electron relaxation process in atoms and molecules.
  • Its occurrence in general binding potentials has not been previously established.

Purpose of the Study:

  • To demonstrate the possibility of interatomic Coulombic decay (ICD) in general binding potentials.
  • To investigate the real-time dynamics and characteristics of ICD in a model system.
  • To explore potential applications of ICD in quantum dot technology.

Main Methods:

  • Utilized the multiconfiguration time-dependent Hartree method for fermions.
  • Studied a two-electron model system comprising two potential wells.
  • Employed box stabilization analysis, autocorrelation function evaluation, and outgoing electron flux measurement.

Main Results:

  • Confirmed that interatomic Coulombic decay (ICD) occurs in general binding potentials.
  • Identified and analyzed two distinct ICD decay channels.
  • Quantified total and partial ICD widths as a function of inter-well distance.

Conclusions:

  • Interatomic Coulombic decay (ICD) is a viable phenomenon in broader potential systems beyond atoms and molecules.
  • The study provides a foundation for understanding ICD dynamics in complex potentials.
  • Results suggest potential applications for ICD in advancing quantum dot technology.