Fermi-level pinning and growth characteristics of Au on InP(111)

Kathleen A. Stair*, Yip Wah Chung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Atomically clean phosphorus-enriched InP(111) surfaces have been produced by argon sputtering and subsequent annealing in a phosphorus ambient. Pinning of the surface Fermi level at a position 1.10 eV above the valence band maximum has been observed on clean, well-annealed InP(111). In addition, a range of surface Fermi levels from 0.70 to 1.10 eV above the valence band maximum has been observed for various InP(111) surfaces as a function of annealing temperature and degree of stoichiometry. For a well-annealed InP(111) surface, the Fermi level position after gold deposition appears to saturate at a position 0.70 eV above the valence band maximum. We interpret these results in terms of multiple defect levels in the bandgap. Observations of In4d and Au4f photoemession peaks demonstrate both the dissociation of InP and intermixing between gold and the substrate. Photoemission of adsorbed xenon further indicates that intermixing occurs without formation of Au clusters.

Original languageEnglish (US)
Pages (from-to)381-391
Number of pages11
JournalApplied Surface Science
Volume26
Issue number4
DOIs
StatePublished - Oct 1 1986

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Fermi-level pinning and growth characteristics of Au on InP(111)'. Together they form a unique fingerprint.

Cite this