Seminars Archive

Many body effects in solids studied by Angle-Resolved Photoemission Spectroscopy (ARPES)

Abstract
Angle-resolved photoemission spectroscopy provides us with information about the occupied band structure and allows to systematically investigate the electronic structure of solids as a function of momentum and temperature. In the last decade the focus of ARPES studies has shifted away from the band structure determination and many experiments are now concerned with details of photoemission lineshape and their relation to the many body effects in the solid. In the presented talk the temperature dependences of the photoemission line width broadening have been studied and the values of electron-phonon mass enhancement parameter lambda have been determined for metallic and semimetallic surfaces. The comparison of theoretical values for electron-phonon and electron-electron contributions to the photohole lifetime with observed photoemission results will be discussed.