High-pressure structural behaviour of nanocrystalline Ge

Publication: Research - peer-reviewJournal article – Annual report year: 2007

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The equation of state and the pressure of the I-II transition have been studied for nanocrystalline Ge using synchrotron x-ray diffraction. The bulk modulus and the transition pressure increase with decreasing particle size for both Ge-I and Ge-II, but the percentage volume collapse at the transition remains constant. Simplified models for the high-pressure structural behaviour are presented, based on the assumption that a large fraction of the atoms reside in grain boundary regions of the nanocrystalline material. The interface structure plays a significant role in affecting the transition pressure and the bulk modulus.
Original languageEnglish
JournalJournal of Physics: Condensed Matter
Publication date2007
Volume19
Issue15
Pages156217
ISSN0953-8984
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 10
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