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HL: Fachverband Halbleiterphysik

HL 108: Poster: Ultra-fast phenomena / Optical properties / Semiconductor laser / Devices and device concepts

HL 108.4: Poster

Donnerstag, 3. April 2014, 17:00–20:00, P1

Incoherent Phonon Heating Model derived from the system Hamiltonian — •Messan Afande, Eeuwe S. Zijlstra, and Martin E. Garcia — Theoretische Physik, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany

The purpose of the current work is the derivation of the equation of motion of atoms in solid state materials with emphasis on incoherent phonon heating. The modeling is based upon the application of the Ehrenfest theorem by considering the overall system Hamiltonian, in particular, including electron-phonon interactions. In the following, it is planned to integrate the derived model into an ab initio Molecular Dynamics simulation code for studying lattice vibrations in solid state materials after femtosecond-laser excitation.