Surface and image-potential states on MgB2(0001) surfaces - art. no. 172512

Authors
Silkin, VM Chulkov, EV Echenique, PM
Citation
Vm. Silkin et al., Surface and image-potential states on MgB2(0001) surfaces - art. no. 172512, PHYS REV B, 6417(17), 2001, pp. 2512
Citations number
33
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6417
Issue
17
Year of publication
2001
Database
ISI
SICI code
0163-1829(20011101)6417:17<2512:SAISOM>2.0.ZU;2-K
Abstract
We present self-consistent pseudopotential calculations of surface and imag e-potential states on MgB2(0001) for both B-terminated (B-t) and Mg-termina ted (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 surface s. The surface layer density of states (DOS) at EF is increased by 55% at t he B-t and by 90% at the Mg-t surface compared to DOS in the corresponding bulk layers.