Diminished medium-range order observed in annealed amorphous germanium

J. M. Gibson, M. M.J. Treacy

Research output: Contribution to journalArticlepeer-review

157 Scopus citations


We use variable coherence transmission electron microscopy to examine medium-range ordering in vacuum-deposited amorphous germanium. The method accesses higher-order atomic correlations through statistical analysis of hollow-cone dark-field image speckle. This yields greater sensitivity to medium-range order than the familiar pair correlation function obtained from diffraction. We find that thermal annealing of amorphous germanium reduces the degree of medium-range order, affirming the thermodynamic stability of the random network.

Original languageEnglish (US)
Pages (from-to)1074-1077
Number of pages4
JournalPhysical Review Letters
Issue number6
StatePublished - Feb 10 1997
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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