Berlin 2015 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 55: Quantum dots: Interaction with environment
HL 55.2: Talk
Wednesday, March 18, 2015, 15:15–15:30, EW 203
Geometrical Control of the Interatomic Coulombic Decay Process in Quantum Dots — Praphasiri Dolbundalchok1 and •Annika Bande1,2 — 1Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany — 2Institute of Methods for Material Development, Helmholtz-Zentrum Berlin and Joint Lab JuLiq with Department of Physics, FU Berlin, Albert-Einstein-Str. 15, 12489 Berlin, Germany
The elementary physical process of interatomic Coulombic decay (ICD) is recognized as an ultrafast energy transfer process between atoms and molecules induced by long range electron correlation. It was shown to be also possible in arrays of semiconductor quantum dots (QDs). An electron bound to an excited state of one of the QDs decays by transferring its energy to the neighboring QD from which a second electron is emitted.
Different from atomic ICD, ICD in QDs is postulated to find technological application either in infrared photo detectors or solar cells. Most appealing for this technological use is that by geometry variation of the QDs the ICD rate can be controlled.
In this work we present the control of the two-electron ICD process by geometry variation of QDs represented by electron binding potentials in electron dynamics calculations with the highly accurate multiconfiguration time-dependent Hartree (MCTDH) method for antisymmetric electronic wave functions.