Diminished medium-range order observed in annealed amorphous germanium

J. M. Gibson; M. M.J. Treacy

doi:10.1103/PhysRevLett.78.1074

Diminished medium-range order observed in annealed amorphous germanium

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

Research output: Contribution to journal › Article › peer-review

160 Scopus citations

Abstract

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 language	English (US)
Pages (from-to)	1074-1077
Number of pages	4
Journal	Physical Review Letters
Volume	78
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.78.1074
State	Published - Feb 10 1997
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.78.1074

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title = "Diminished medium-range order observed in annealed amorphous germanium",

abstract = "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.",

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AB - 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.

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Diminished medium-range order observed in annealed amorphous germanium

Abstract

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