APPLICATION OF MAXIMUM-ENTROPY TO EXTRACT FERMI-SURFACE TOPOLOGY FROMPOSITRON-ANNIHILATION MEASUREMENT

Over the past two decades or so, the positron annihilation technique h as successfully probed Fermi surface (Fs) topologies in a variety of m etals and alloy systems. However, in electronically complex systems, d ue to the relatively weak FS Signals compared with those arising from annihilations from a large number of full bands, possible strong posit ron wave function comes into effect. Here, we introduce a new way of l ooking at the problem using maximum-entropy enhancement of the data. T est results from the simple FS picture of vanadium are presented.