1. Comparing ultrafast surface and bulk heating using time-resolved electron diffraction
- Author
-
Ping Zhou, Uwe Bovensiepen, Martin Kammler, A. Kalus, C. Streubühr, D. von der Linde, Manuel Ligges, M. Horn-von Hoegen, and A. Hanisch-Blicharski
- Subjects
Reflection high-energy electron diffraction ,Physics and Astronomy (miscellaneous) ,Electron diffraction ,Chemistry ,Molecular vibration ,Relaxation (NMR) ,chemistry.chemical_element ,Physik (inkl. Astronomie) ,Debye–Waller factor ,Atomic physics ,Ultrashort pulse ,Excitation ,Bismuth - Abstract
From measurements of the transient Debye-Waller effect in Bismuth, we determine the buildup time of the random atomic motion resulting from the electronic relaxation after short pulse laser excitation. The surface sensitive reflection high energy electron diffraction and transmission electron diffraction yield a time constant of about 12 ps and 3 ps, respectively. The different energy transfer rates indicate relatively weak coupling between bulk and surface vibrational modes.
- Published
- 2014