STM contrast inversion of the Fe(110) surface
arXiv:1309.4696 · doi:10.1016/j.apsusc.2014.02.143
Abstract
We extend the orbital-dependent electron tunneling model implemented within the three-dimensional (3D) Wentzel-Kramers-Brillouin (WKB) atom-superposition approach to simulate spin-polarized scanning tunneling microscopy (SP-STM) above magnetic surfaces. The tunneling model is based on the electronic structure data of the magnetic tip and surface obtained from first principles. Applying our method, we analyze the orbital contributions to the tunneling current, and study the nature of atomic contrast reversals occurring on constant-current SP-STM images above the Fe(110) surface. We find an interplay of orbital-dependent tunneling and spin-polarization effects responsible for the contrast inversion, and we discuss its dependence on the bias voltage, on the tip-sample distance, and on the tip orbital composition.
20 pages manuscript, 5 figures
References in corpus (6)
- Orbital dependent electron tunneling within the atom superposition approach: Theory and application to W(110)
- Theoretical study of the role of the tip in enhancing the sensitivity of differential conductance tunneling spectroscopy on magnetic surfaces
- Simulation of spin-polarized scanning tunneling spectroscopy on complex magnetic surfaces: Case of a Cr monolayer on Ag(111)
- Simulation of spin-polarized scanning tunneling microscopy on complex magnetic surfaces: Case of a Cr monolayer on Ag(111)
- Arbitrary tip orientation in STM simulations: 3D WKB theory and application to W(110)
- Prediction of the bias voltage dependent magnetic contrast in spin-polarized scanning tunneling microscopy
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