We present a self-consistent pseudopotential calculation of surface and image-potential states on MgB2(0001) for both B-terminated (B−t) and Mg-terminated (Mg−t) surfaces. We find a variety of very clear surface and subsurface states as well as resonance image-potential states n=1,2 on both surfaces. The surface layer DOS at EF is increased by 55% at B−t and by 90% at the Mg−t surface compared to DOS in the corresponding bulk layers.
@article{arxiv.cond-mat/0105628,
title = {Surface and Image-Potential States on the MgB_2(0001) Surfaces},
author = {V. M. Silkin and E. V. Chulkov and P. M. Echenique},
journal= {arXiv preprint arXiv:cond-mat/0105628},
year = {2009}
}