TY  - JOUR
AU  - Lezaic, M.
AU  - Mavropoulos, Ph.
AU  - Bihlmayer, G.
AU  - Blügel, S.
TI  - Scanning tunnelling microscopy of surfaces of half-metals: an ab-initio study on NiMnSb(001)
JO  - Journal of physics / D
VL  - 39
SN  - 0022-3727
CY  - Bristol
PB  - IOP Publ.
M1  - PreJuSER-50607
SP  - 797 - 802
PY  - 2006
N1  - Record converted from VDB: 12.11.2012
AB  - We present a first-principles Study of the unreconstructed (001) surfaces of the half-metallic ferromagnet NiMnSb. Both terminations (MnSb and Ni) are considered. We find that half-metallicity is lost at the surfaces. After a discussion of the geometric relaxations and the spin-polarized surface band structure, we focus on topography images which are expected to be found with spin-polarized scanning tunnelling microscopy. For the MnSb-terrninated surface we find that only the Sb atoms are visible, reflecting a geometric buckling caused by relaxations. For the Ni-terminated surface we find a strong contrast between the images of forward and reverse tip-sample-bias of 0.5 eV, as well as a stripe-like image for reverse bias. We interpret these findings in terms of highly directional Surface states which are formed in the spin-down gap region.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000236264200006
DO  - DOI:10.1088/0022-3727/39/5/S05
UR  - https://juser.fz-juelich.de/record/50607
ER  -