Electronic Structure of Semiconductor Interfaces

von Winfried Mönch

150 Seiten, Taschenbuch

Kurzbeschreibung des Verlags

This concise volume examines the characteristic electronic parameters of semiconductor interfaces, namely the barrier heights of metal–semiconductor or
Schottky
contacts and the valence-band discontinuities of semiconductor–semiconductor interfaces or heterostructures. Both are determined by the same concept, namely the wave-function tails of electron states overlapping a semiconductor band gap directly at the interface. These interface-induced gap states (IFIGS) result from the complex band structure of the corresponding semiconductor. The IFIGS are characterized by two parameters, namely by their branch point, at which their charge character changes from predominantly valence-band- to conduction-band-like, and secondly by the proportionality factor or slope parameter of the corresponding electric-dipole term, which varies in proportion to the difference in the electronegativities of the two solids forming the interface. This IFIGS-and-electronegativity concept consistently and quantitatively explains the experimentally observed barrier heights of
Schottky
contacts as well as the valence-band offsets of heterostructures. Insulators are treated as wide band-gap semiconductors.

• Reihe: Synthesis Lectures on Engineering, Science, and Technology
• ISBN: 9783031590665
• Sprache: Englisch
• Erscheinungsdatum: 16.06.2025
• Genre: Physik, Astronomie/Atomphysik, Kernphysik
• Verlag: Springer International Publishing