We present photoemission overviews of major valence band fe~tures for the valence bands of several common group IV, 111-V and 11-VI semiconductors, which were obtained using synchrotron radiation in the 20-90 eV range from the 2.5 GeV storage ring at the Cambridge Electron Accelerator. Comparisons of our photoeniission data with empirical pseudopotential method (EPM) calculations fit to optical...

Abstract: In this study, using density functional theory and the SIESTA computationalcode, we investigate the electronic and optical properties of the armchair graphenenanoribbons and the armchair boron nitride nanoribbons of width 25 in the presence of atransverse external electric field. We have observed that in the absence of the electricfield, these structures are se...