Electronic Density of States at Transition-Metal Surfaces

Abstract

A completely real-space solution of the tight-binding Hamiltonian has allowed a realistic interpretation of ion-neutralization spectroscopy and some ultraviolet photoelectron spectroscopy data in terms of the surface density of states at transition-metal surfaces. The rms width of the $d$-band density of states decreases as the square root of the coordination number of surface atoms. The extent to which this is observed depends on the surface sensitivity of the experimental technique.