Potential, core-level, and d band shifts at transition-metal surfaces

M. Ganduglia-Pirovano, V. Natoli, M. Cohen, J. Kudrnovský

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

We have extended the validity of the correlation between the surface 3d core-level shift (SCLS) and the surface d band shift (SDBS) to the entire 4d transition-metal series and to the neighboring elements Sr and Ag via accurate first-principles calculations. We find that the correlation is quasilinear and robust with respect to the differencies both between initial- and final-state calculations of the SCLS’s and two distinct measures of the SDBS’s. We show that despite the complex spatial dependence of the surface-potential shift (SPS) and the location of the 3d and 4d orbitals in different regions of space, the correlation exists because the sampling of the SPS by the 3d and 4d orbitals remains similar. We show further that the sign change of the SCLS’s across the transition series does indeed arise from the d band-narrowing mechanism previously proposed. However, while in the heavier transition metals the predicted increase of d electrons in the surface layer relative to the bulk arises primarily from transfers from s and p states to d states within the surface layer, in the lighter transition metals the predicted decrease of surface d electrons arises primarily from flow out into the vacuum.

Original languageEnglish (US)
Pages (from-to)8892-8898
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number12
DOIs
StatePublished - Jan 1 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Potential, core-level, and d band shifts at transition-metal surfaces'. Together they form a unique fingerprint.

  • Cite this