title: Local density of states at metal-semiconductor interfaces: an atomic scale study.
abstract: We investigate low temperature grown, abrupt, epitaxial, nonintermixed, defect-free n-type and p-type Fe/GaAs(110) interfaces by cross-sectional scanning tunneling microscopy and spectroscopy with atomic resolution. The probed local density of states shows that a model of the ideal metal-semiconductor interface requires a combination of metal-induced gap states and bond polarization at the interface which is nicely corroborated by density functional calculations. A three-dimensional finite element model of the space charge region yields a precise value for the Schottky barrier height.
authors.affiliation: IV. Physical Institute - Solids and Nanostructures, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Iffländer
authors.affiliation: IV. Physical Institute - Solids and Nanostructures, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Rolf-Pissarczyk
authors.affiliation: IV. Physical Institute - Solids and Nanostructures, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
authors.forename: L
authors.initials: L
authors.lastname: Winking
authors.affiliation: IV. Physical Institute - Solids and Nanostructures, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
authors.forename: R G
authors.initials: RG
authors.lastname: Ulbrich
authors.affiliation: Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Al-Zubi
authors.affiliation: Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Blügel
authors.affiliation: IV. Physical Institute - Solids and Nanostructures, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Wenderoth