PMID: 12785970Jun 6, 2003Paper

Metal-induced gap states at well defined alkali-halide/metal interfaces

Physical Review Letters
Manabu KiguchiHideo Aoki

Abstract

In order to search for states specific to insulator/metal interfaces, we have studied epitaxially grown interfaces with element-selective near edge x-ray absorption fine structure. An extra peak is observed below the bulk edge onset for LiCl films on Cu and Ag substrates. The nature of chemical bonds as probed by x-ray photoemission spectroscopy and Auger electron spectroscopy remains unchanged, so we regard this as evidence for metal-induced gap states (MIGS) formed by the proximity to a metal, rather than local bonds at the interface. The dependence on the film thickness shows that the MIGS are as thin as one monolayer. An ab initio electronic structure calculation supports the existence of the MIGS that are strongly localized at the interface.

References

Aug 15, 1989·Physical Review. B, Condensed Matter·X WengH Ma
Jun 23, 1986·Physical Review Letters·J Tersoff
Jan 22, 2002·Physical Review Letters·S SchintkeW D Schneider

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Citations

Oct 18, 2006·The Journal of Chemical Physics·F SchillerJ Kröger
Mar 28, 2006·Nanotechnology·Ch LoppacherM Schreiber
Sep 3, 2014·Physical Chemistry Chemical Physics : PCCP·Jun-ichi TakashiroManabu Kiguchi

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