Regensburg 2007 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 15: Poster Session
DS 15.19: Poster
Dienstag, 27. März 2007, 15:00–17:00, Poster B
Time dependent desciption of thermal effects during transmission of electrons through thin solids — •Werner Koch1, Frank Grossmann1, Axel Rother2, and Rüdiger Schmidt1 — 1Institut für Theoretische Physik, Technische Univeristät Dresden, 01062 Dresden — 2Institut für Strukturphysik, Technische Univeristät Dresden, 01062 Dresden
As it has been shown by Schmidt[1], the coherence length of projectile electrons propagating in Transmission Electron Microscopes (TEM) is of the same order of magnitude as the target thickness. Therefore the modelling of the processes involved in high resolution microscopy by means of a plane wave approach seems too crude an approximation. The purpose of this project is to develop a method to describe this process by propagating localized electron wave packets. A comparison of the incorporation of thermal effects is given between a full ensemble average of independent simulations in frozen lattice approximation and the modelling via the Debye-Waller factor.
[1]: Schmidt, H. 1985: Fakultaet der Physik, der Eberhard-Karls-Universitaet zu Tuebingen, Diss.