Parts | Days | Selection | Search | Updates | Downloads | Help
DS: Fachverband Dünne Schichten
DS 36: Poster Session I
DS 36.75: Poster
Thursday, March 19, 2015, 09:30–12:00, Poster A
Ginzburg-Landau theory for collective excitations in In/Si(111) — •Yasemin Ergün and Eric Jeckelmann — Leibniz Universität Hannover, Germany
We investigate the dynamics of collective excitations in Peierls insulators using the Ginzburg-Landau (GL) theory for quasi-one-dimensional charge-density-wave systems. Starting from a microscopic Su-Schrieffer-Heeger-like model for In/Si(111), we generalized the GL theory for systems with several Peierls modes. This formalism allows us to study the vibrations and the non-equilibrium dynamics of collective "amplitude" modes (lattice distortion and density modulation) which are involved in a Peierls transition. We discuss our theoretical results in relation to spectroscopy experiments for In/Si(111). Support from the DFG through the Research Unit FOR 1700 is gratefully acknowledged.