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SUMMARY:Phonon anomalies in superconductors studied by Inelastic X-ray Sca
 ttering - Matteo d'Astuto (Université Pierre et Marie Curie)
DTSTART:20070123T111500Z
DTEND:20070123T121500Z
UID:TALK6377@talks.cam.ac.uk
CONTACT:Michael Sutherland
DESCRIPTION:Phonon dispersion and lifetime are important data in order to 
 model the electron-phonon coupling in superconductors. The standard techni
 que for\nsuch measurements\, inelastic neutron scattering\, requires large
  volume single crystals\, which are not always available. In particular\, 
 this is\noften the case for newly synthesised compound.\nRecently\, inelas
 tic x-ray scattering (IXS) has emerged as a possible\nalternative\, effect
 ive even with sample sizes  of few\ntens of microns. We will show the resu
 lts obtained using IXS in selected systems\, such as electron-doped and ho
 le doped perovskite cuprate and MgB$_2$. We will\ndraw a comparison betwee
 n the high Tc compounds and the phonon mediated superconductors\, in order
  to unveil the controversial role of phonon anomalies in the former. We wi
 ll also discuss the complementarity between inelastic x-ray scattering  an
 d inelastic neutron scattering spectroscopies for such kind of investigati
 ons.\n
LOCATION:Mott Seminar Room\, Cavendish Laboratory\, Department of Physics
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