Periodic lattice distortion accompanying the charge-density-wave transition for Sn/Ge(111)

Jiandi Zhang, I. Ismail, P. J. Rous, A. P. Baddorf, E. W. Plummer

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Abstract

The periodic lattice distortion (PLD) accompanying the charge-density-wave (CDW) transition (at -60 °C) in the a phase of Sn on Ge(111) has been determined by combining the distinct sensitivities of low-energy electron diffraction (LEED) and surface x-ray diffraction (SXRD). New LEED I - V data combined with a SXRD analysis yield a significant lattice distortion. The PLD accompanying the CDW transition is a 0.37-Å vertical rippling of the Sn atoms accompanied by a perpendicular (0.17 Å) and parallel (0.12 Å) distortion of the first-layer Ge atoms, consistent with a band Jahn-Teller-like distortion.

Original languageEnglish
Pages (from-to)2860-2863
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number4
DOIs
StatePublished - 1999

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