Chemical shifts in the MNN Auger spectra of Cd, In, Sn, Sb and Te

✍ Scribed by L. C. Lynn; R. L. Opila

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 514 KB
• Volume: 15
• Category: Article
• ISSN: 0142-2421
• DOI: 10.1002/sia.740150220

✦ Synopsis

Abstract

The MNN Auger spectra of a series of elements, Cd through Te, have been examined as a function of chemical state. The spectra of Cd, In, Sn and Sb do not change shape significantly whether the element is present as a metal, semiconductor or insulator, e.g. Cd, CdTe or CdO. The Kinetic energies of the Auger electrons do shift by large, easily measurable, amounts of 3–6 eV. These shifts are to lower kinetic energy with respect to the pure metal and are largest for the oxides and least for the semiconductors. These spectra are atom‐like and the two final‐state holes are localized on one atom. The shape of the MNN Auger spectrum of Te reflects changes in its chemical state and shows shifts in energy similar to those seen for Cd, In, Sn and Sb. The changes in energy are much larger than those seen in photoemission and are the result of changes in the extra‐atomic screening of the double‐charged final‐state ion.