Surface electronic structure and off-site Auger transitions on TaC(111) observed with Auger-photoelectron coincidence spectroscopy

R. A. Bartynski, S. Yang, S. L. Hulbert, C. C. Kao, M. Weinert, D. M. Zehner

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31 Scopus citations

Abstract

The Ta N7-VV Auger spectrum of TaC(111) has been measured in coincidence with photoemission from the bulk and surface shifted Ta 4f7/2 core levels. Good agreement is found between the surface Auger spectrum and a self-convolution of the density of states (SCDOS) at surface Ta sites determined by a first-principles calculation. The bulk spectrum disagrees with the bulk SCDOS but is well described by an incoherent sum of the bulk SCDOS and the surface spectrum. A novel off-site Auger decay mechanism, first observed on Ta(100), accounts for these observations.

Original languageEnglish (US)
Pages (from-to)2247-2250
Number of pages4
JournalPhysical review letters
Volume68
Issue number14
DOIs
StatePublished - 1992

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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