Scanning tunneling microscopy of surfaces of half-metals: an ab-initio study on NiMnSb(001)

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dc.creatorLežaić, Marjana
dc.creatorMavropoulos, Phivos
dc.creatorBihlmayer, Gustav
dc.creatorBlügel, Stefan
dc.date2005-10-18
dc.date.accessioned2026-07-07T06:44:32Z
dc.date.available2026-07-07T06:44:32Z
dc.descriptionWe 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 tunneling microscopy. For the MnSb-terminated 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.
dc.descriptionSubmitted to J. Phys. D: Appl. Phys
dc.identifierhttps://arxiv.org/abs/cond-mat/0510485
dc.identifierhttp://arxiv.org/abs/cond-mat/0510485
dc.identifierJ. Phys. D: Appl. Phys. 39 No 5, 797-802 (2006)
dc.identifierdoi:10.1088/0022-3727/39/5/S05
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/102804
dc.subjectMaterials Science
dc.titleScanning tunneling microscopy of surfaces of half-metals: an ab-initio study on NiMnSb(001)
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