HETEROJUNCTION BAND DISCONTINUITY CHANGE BY ULTRATHIN INTRALAYER: Na

Abstract
The changes of band offset of Ge-GaAs(100) heterojunction are observed by means of an ultrathin Na intralayer with the photoemission spectroscopy. 1 ML Na intralayer increases the valence-band discontinuity of Ge-GaAs by 0.19 eV on the average.