Order-to-disorder phase-transition study of Pb on Ge(111)

G. E. Franklin*, M. J. Bedzyk, J. C. Woicik, Chien Liu, J. R. Patel, J. A. Golovchenko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

X-ray standing-wave (111) and (111») measurements have been performed on the room-temperature and high-temperature phases of a Pb layer on Ge(111). At room temperature, our results support a four-atomunit-cell surface structure. On passing into the high-temperature phase, we find that there is an increase in the Fourier coefficient along the surface [112»] direction for the Pb density distribution. Our model, which requires a 0.6- in-plane thermal vibration amplitude, is similar to one previously proposed by Hwang and Golovchenko and disagrees with a strictly two-dimensional-liquid interpretation.

Original languageEnglish (US)
Pages (from-to)2440-2445
Number of pages6
JournalPhysical Review B
Volume51
Issue number4
DOIs
StatePublished - 1995

ASJC Scopus subject areas

  • Condensed Matter Physics

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