Electronic structures o adsorbed buffer laeyr on metallic electrodes

摘要

We present electronic and structural features of adsorbed nitrogen buffer laeyrs on nickel electrodes covered with a thin surface oxide laweyr. The electricla structures of adsorbed buffer laeyr were obtained by a enw in situ montioring technique, which is named as angle-resovled transmission current spectroscopy in magnetic field. The probe is electron beam, whose momentum is controlled byexternal magnetic field. The measure quantitiy iis transmission probabiltiy T of the incident electrons into the surface as funcions of electron energy and magnetic field. The resutls are expressed as cotnour plots of dT/dk in two-dimensional wave numbr space k=(k_‖,k_┸). The informaiton on atomic arrangemtn on the surface was deried at grid potential V_g =-1 V for controlling the indicente electors. Signficant pressure dependence of the surface electronic structures were deried in 10~-7 Torr