Surface waves on NiAl(110) - art. no. 115421

Authors
Hansen, KH Gottschalck, J Petersen, L Hammer, B Laegsgaard, E Besenbacher, F Stensgaard, I
Citation
Kh. Hansen et al., Surface waves on NiAl(110) - art. no. 115421, PHYS REV B, 6311(11), 2001, pp. 5421
Citations number
26
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6311
Issue
11
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010315)6311:11<5421:SWON-A>2.0.ZU;2-L
Abstract
We have investigated the electronic structure of the (110) surface of the N iAl ordered alloy by a combination of scanning tunneling microscopy (STM) a nd density functional theory band-structure calculations. We present STM im ages of standing waves on NiAl(110), at both room temperature and 140 K. By Fourier transforming the STM images we obtain an anisotropic surface Fermi contour containing contributions from waves with two different k vectors. Based on band-structure calculations, the origin of the two standing waves has been assigned to a surface state and to the edge of the projected bulk band.