Surface electronic structure of the Fe3O4(100) : Evidence of a half-metal to metal transition

By M. Fonin, R. Pentcheva, Y. Dedkov, M. Sperlich, D. Vyalikh, Matthias Scheffler, U. Rüdiger, G. Güntherodt. 2005

187 citations recorded by the source corpus.

In situ prepared Fe3O4100 thin films were studied by means of scanning tunneling microscopy STM and spin-polarized photoelectron spectroscopy SP-PES. The atomically resolved 22R45° wavelike surface atomic structure observed by STM is explained based on density functional theory DFT and ab initio atomistic thermodynamics calculations as a laterally distorted surface layer containing octahedral iron and oxygen, referred to as a modified B layer. The work-function value of the Fe3O4100 surface extracted from the cutoff of the photoelectron spectra is in good agreement with that predicted from DFT. On the Fe3O4100 surface both the SP-PES measurements and the DFT results show a strong reduction of the spin polarization at the Fermi level EF compared to the bulk density of states. The nature of the states in the majority band gap of the Fe3O4 surface layer is analyzed.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/92bfd1d9be0cd18d44290bdf680dd940ea55cfa7

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In Atomic and Molecular Physics, and Optics

1. A. Barthélémy
2. Manuel Bibes

In Materials Chemistry

1. A. Barthélémy
2. Manuel Bibes
3. J. Scott

Citations in the corpus

• Oxide Spintronics (2007, background): “The surface and interface properties of Fe3O4 are still under investigation to understand spin-polarization measurements and their connection with predictions from ab initio calculations [156], [171].”