Direct solutions of the Si(111) 7 × 7 structure

C. J. Gilmore*, L. D. Marks, D. Grozea, C. Collazo, E. Landree, R. D. Twesten

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


We show that it is possible to use direct methods to solve surface structures as complicated as that of the Si(111) 7 × 7. The first of these methods is maximum entropy combined with likelihood estimation, the second a combination of symbolic phasing methods and weakly interpolating modifications of the Sayre equation. These techniques are applied to two different elements of the structure determination, namely ab initio structure determination solely from diffraction intensity data and phase extension from a set of known phases derived from high resolution images.

Original languageEnglish (US)
Pages (from-to)77-91
Number of pages15
JournalSurface Science
Issue number2-3
StatePublished - Jun 10 1997


  • Adatoms
  • Diffraction
  • Electron-solid interactions
  • High index single crystal surfaces
  • Scattering
  • Single crystal surfaces; surface relaxation and reconstruction
  • Transmission high-energy electron diffraction

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry


Dive into the research topics of 'Direct solutions of the Si(111) 7 × 7 structure'. Together they form a unique fingerprint.

Cite this