Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 24: Low-Dimensional Systems: 1D - Theory

TT 24.7: Vortrag

Dienstag, 21. März 2017, 11:15–11:30, HSZ 204

Scattering of an electronic wave packet by a one-dimensional electron-phonon-coupled structure — •Christoph Brockt and Eric Jeckelmann — Leibniz Universität Hannover, Germany

We investigate the scattering of an electronic wave packet by phonons within the one-dimensional Holstein model. The electron-phonon coupling is confined in a small structure between two tight-binding leads. We observe permanent energy transfer from the electron to the phonon system, transient self-trapping of the electron in the electron-phonon coupled structure and transmission resonances, that depend on the adiabaticity ratio.

A recently developed TEBD algorithm [1], that uses optimal modes [2] for the bosonic degrees of freedom, was used for this study. Analytical results are provided for a single-site electron-phonon coupled structure and for limiting cases.

Support from the DFG through the Research Unit FOR 1807 is gratefully acknowledged.

[1] C. Brockt et al., PRB 92, 241106 (2015)

[2] C. Zhang, E. Jeckelmann, and S.R. White, PRL 80, 2661 (1998)