STM contrast inversion of the Fe(1 1 0) surface

Gábor Mándi, K. Palotás

Research output: Contribution to journalArticle

10 Citations (Scopus)

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. .

Original languageEnglish
Pages (from-to)65-72
Number of pages8
JournalApplied Surface Science
Volume304
DOIs
Publication statusPublished - Jun 15 2014

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Scanning tunneling microscopy
Spin polarization
Electron tunneling
Bias voltage
Electronic structure
Atoms
Chemical analysis

Keywords

  • Atomic contrast reversal
  • Fe(1 1 0)
  • Orbital-dependent tunneling
  • SP-STM
  • Spin-polarized tunneling
  • STM imaging

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

STM contrast inversion of the Fe(1 1 0) surface. / Mándi, Gábor; Palotás, K.

In: Applied Surface Science, Vol. 304, 15.06.2014, p. 65-72.

Research output: Contribution to journalArticle

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