Exchange-Split Empty Energy Bands of Fe(110)

Abstract

Spin- and momentum-resolved bremsstrahlung isochromat spectra from Fe(110) at $\hslash \omega =9.7\mathrm{}$ eV are presented, a combination which allows for the first time the determination of experimental final-state dispersions $E\left(k_{\parallel }\right)$ for direct interband transitions into majority and minority final bands separately. Data are in good agreement with relevant theoretical $E\left(k_{\parallel }\right)$ values from bulk band-structure calculations as far as minority final states are concerned. Theoretical predictions for the majority states exhibit a stronger dispersion than observed experimentally.