Publication
Physical Review Letters
Paper

Synchrotron x-ray diffraction study of the disordering of the Ge(111) surface at high temperatures

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Abstract

The Ge(111) surface has been reported to undergo a disordering phase transition at approximately 1050 K. Our synchrotron x-ray diffraction study demonstrates that there is, instead, a progressive disordering of the topmost layers, which retain long-range order up to at least 1150 K. Neither diffuse scattering associated with roughening or surface melting nor effects due to surface incommensurability are observed. A model involving a proliferation of surface vacancies gives a consistent description of the data. © 1991 The American Physical Society.

Date

15 Apr 1991

Publication

Physical Review Letters