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Title: Comparing ultrafast surface and bulk heating using time-resolved electron diffraction

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.
Authors:
; ; ; ;  [1] ; ; ; ;  [1] ;  [2]
  1. Faculty of Physics, University of Duisburg-Essen, Duisburg 47057 (Germany)
  2. (Germany)
Publication Date:
OSTI Identifier:
22262544
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 16; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BISMUTH; DEBYE-WALLER FACTOR; ELECTRON DIFFRACTION; ENERGY TRANSFER; EXCITATION; HEATING; SURFACES; TIME RESOLUTION