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Scanning tunneling spectroscopy study of the electronic structure of Fe3O4 surfaces

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Figure

FIG. 1. Schematic representation of the energy levels of the
FIG. 2. ��the magnetitespectra of the magnetiteIsame tunneling behavior. The presence of a semiconducting bandgap at the magnetite surface is evident from the spectra.resentative normalized room temperature spectrum
FIG.3.�marked with a white arrow, exhibits localized step bunching. Aresultant change in tunneling behavior is seen in thesurfacesurfacesurface following deposition ofIgap region resulting in the complete closing of the semiconductingarea shows markedly di
FIG. 5. �that a large opening of the band-gap140 Kresolved in the conduction and valence bands shifted dramaticallycompared with the spectra at 140 K

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