Seminars Archive
Alessandra Lanzara
Abstract
Wednesday, April 11, 2001, 14:00
Seminar Room, ground floor, Building "T"
Sincrotrone Trieste, Basovizza
Strong Electron-Phonon coupling in High Temperature Superconductors.
Alessandra Lanzara
(Department of Physics and Applied Physics, Stanford University and
Advanced Light Source, Lawrence Berkeley National Lab.)
ABSTRACT
We report high-resolution angle resolved photoemission data on different
families of high temperature superconductors, as a function of momentum,
doping and temperature. An abrupt change in the electronic quasiparticle
dispersion and in the Im_(k,_) at the frequency _0 =(5515) meV
has been observed. The existence of this energy scale is ubiquitous in
p- and n-type cuprates and persists well above Tc. This behavior indicates
the presence of a strong electron-phonon coupling, likely to be very important
for the physical properties and pairing mechanism high temperature superconductors.
