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SUMMARY:Investigating pnictogen surfaces via HAS: The effect of electron-h
 ole excitations on measured vibronic modes - Patrick Kraus\, Graz Universi
 ty of Technology\, Austria
DTSTART:20151022T150000Z
DTEND:20151022T160000Z
UID:TALK60159@talks.cam.ac.uk
CONTACT:Stephen Walley
DESCRIPTION:The surface properties of the pnictogens bismuth (Bi) and anti
 mony (Sb) have been of great interest to the development of the newly foun
 d material class of topological insulators. As has recently been shown by 
 the group of El-Batanouny in Boston\, the vibronic structure of topologica
 l materials as measured by helium atom scattering is heavily influenced by
  its special surface electronic structure. Since these electronic peculiar
 ities are already present in its base materials Bi and Sb\, it is not surp
 rising that their surface vibronic properties are anomalous as well. Elast
 ic and inelastic helium scattering results as well as their theoretical in
 terpretation will be presented and discussed.
LOCATION:Mott Seminar Room\, Cavendish Laboratory
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