Electronic structure studies of high-T _c superconductors by high-energy spectroscopies

Abstract

A review of our high-energy spectroscopy studies of the electronic structure of the new high-T <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</inf> superconductors is given. X-ray-induced photoelectron spectroscopy, bremsstrahlung-isochromat spectroscopy, Auger electron spectroscopy, and electron energy-loss spectroscopy have been used. Parameters determining the correlated electronic structure have been derived, together with information on the nature and the symmetry of the charge carriers.