HIGH-RESOLUTION COMPTON-SCATTERING IN FERMI-SURFACE STUDIES - APPLICATION TO FEAL

We present a novel theoretical approach to identify Fermi surface cont ributions in high resolution Compton scattering data. For FeAl Compton profiles we show that the Fermi-surface-related features (occupation of states) can be separated from those originating from the spatial ex tent of the wave functions. The first high resolution Compton scatteri ng experiment done at the European Synchrotron Radiation Facility conf irms these findings, This technique opens up new possibilities especia lly in Fermiology studies of high temperature superconductors.