Tip effects in scanning tunnelling microscopy of atomic-scale magnetic structures

Details Tip effects in scanning tunnelling microscopy of atomic-scale magnetic structures Tip effects in scanning tunnelling microscopy of atomic-scale magnetic structures

2001-11-25

arxiv.org/abs/cond-mat/0111477v1

Physics

Condensed Matter

Materials Science

Four pages (RevTeX) and three figures (EPS). For related papers see http://cmmp.phys.ucl.ac.uk/~wah/index.html

Scientific paper

10.1016/S0039-6028(01)01758-7

The spin-polarized scanning tunnelling microscope (STM) can in principle resolve not only the electronic, but also the magnetic surface structure. We model recent STM measurements achieving magnetic resolution on the atomic scale by a first-principles method. It is shown that the signature of a specific magnetic or non-magnetic STM tip can unambiguously be identified. It is also established that the model of Tersoff and Hamann would yield an electronic as well as magnetic contrast of the surface which is well below STM resolution.

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