The Unoccupied Surface States of the Cu(110) Substrate

Abstract

Inverse photoemission spectroscopy is one of the advanced surface science technique formeasuring unoccupied surface states with sufficient accuracy. The unoccupied surfacestates of the Cu(110) substrate has been investigated using an inverse photoemissionspectroscopy with energy resolution of 0.5 eV. In this study, it has been introducednew unoccupied surface states. These unoccupied states are obtained from bulk bandsand placed mainly in the outermost atomic layer. These states have been compared andcontrasted with experimental and theoretical results. It has been also shown that atthe point of the surface Brillouin zone, reflectance anisotropy spectra of the Cu(110)substrate possesses an unoccupied and occupied surface states.