X-ray standing wave imaging of the 1/3 monolayer Sn/Ge(111) surface

J. S. Okasinski, C. Y. Kim, D. A. Walko, Michael J Bedzyk

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


X-ray standing waves (XSW) are used to measure the structure of the(√3 × √3)R 30° to (3 × 3)low-temperature phase transition for the 1/3 monolayer Sn/Ge(111) surface. A three-dimensional direct-space imaging approach, based on the summation of several hklXSW-measured Fourier coefficients, is demonstrated. At room temperature, the Sn atoms are found to occupy the T4-adsorption sites with one-third of the Sn atoms 0.45 Å higher than the remaining two-thirds. The (3 × 3)phase has no significant change in the XSW-measured structural parameters. This is consistent with an order-disorder-type phase transition.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number4
StatePublished - Jan 8 2004

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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