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1990

Iowa State University

Fermi energy

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Inverse-Photoemission Measurement Of Iron Oxides On Polycrystalline Fe, Bong-Soo Kim, Sayong Hong, David W. Lynch Jun 1990

Inverse-Photoemission Measurement Of Iron Oxides On Polycrystalline Fe, Bong-Soo Kim, Sayong Hong, David W. Lynch

Physics and Astronomy Publications

We measured the inverse-photoemission spectra (IPES) of iron oxides grown on an Fe substrate and calculated the band structure of paramagnetic FeO to analyze the IPES. The band-structure calculation showed some overlap between Fe 3d states and O 2p states in the region of occupied states, and s,p-like states of Fe in the unoccupied region. Isochromatic IPES showed two structures at ∼2.5 and ∼7.5 eV above the Fermi energy. We estimated from the IPES data a full band gap of 2.5 eV for FeO.