Mándi, Gábor and Palotás, Krisztián (2014) STM contrast inversion of the Fe(110) surface. Applied Surface Science, 304. pp. 65-72. ISSN 01694332
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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(1 1 0) 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.
| Item Type: | Article |
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| Subjects: | Q Science / természettudomány > QC Physics / fizika > QC06 Physics of condensed matter / szilárdtestfizika |
| Depositing User: | Dr. Krisztián Palotás |
| Date Deposited: | 22 Sep 2014 22:10 |
| Last Modified: | 03 Apr 2023 08:16 |
| URI: | http://real.mtak.hu/id/eprint/16059 |
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