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HL: Fachverband Halbleiterphysik
HL 3: Quantum Dots and Wires: Transport
HL 3.5: Vortrag
Montag, 18. März 2024, 10:45–11:00, EW 202
Electron dynamics of the inter Coulombic decay in higher excited states — •Sara Marando1,3 and Annika Bande1,2 — 1Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 10409 Berlin, Germany — 2Institute of Inorganic Chemistry, Leibniz University Hannover, Callinstr. 9, 30167 Hannover, Germany — 3Institute of Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
Quantum dots (QDs) are semiconducting nanoparticles important due to their size-tunable excitation energy and optical properties: in their self-assembled form they can host electronic or spin qubit states with a decent lifetime . To model electronic processes like the interatomic Coulombic decay (ICD) , in QDs, we apply the Multiconfiguration Time-Dependent Hartree (MCTDH) algorithm in an antisymmetrized version. ICD is described as a decay process between two or more atomic species facilitated by the long-range Coulomb interaction between electrons at different spatial locations: on the one hand, an electron in a high energy state relaxes to a lower energy state while the energy is transferred to an electron neighbour, which is simultaneously ionised. The system studied in this work consists of a one-dimensional double-well GaAs potential. It is modeled to accommodate different electronic levels (s to d energy levels) and allows ICD to occur among higher excited states.
Keywords: Electron dynamics; Quantum Dots; Excited states; ICD; MCTDH