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Pressure-induced isostructural phase transformation in γ -B 28

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Zarechnaya, E. Dubrovinskaia, N. Caracas, R. Merlini, M. Hanfland, M. Filinchuk, Yaroslav [UCL] Dubrovinsky, L.

Isostructural phase transformations (ISPhTs) so far were reported only for heavy elements and their compounds with complex electronic and/or magnetic structures. Studies of one of the lightest elemental material, high-pressure boron γ -B28, by means of in situ single-crystal x-ray diffraction and Raman spectroscopy reveal abrupt changes in the compressional behavior and Raman spectra at 40 GPa. Combined experimental and ab initio theoretical analysis of the structural and vibrational properties of γ -B28 suggests that the ISPhT under compression is due to the changes in the polarity of the covalent bonds between the boron atoms in the complex quasimolecular structure of γ -B28. © 2010 The American Physical Society.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2010
Language Anglais
Journal information "Physical Review B - Condensed Matter and Materials Physics" - Vol. 82, no.18, p. 1-11 (2010)
Peer reviewed yes
issn 1098-0121
Publication status Publié
Affiliation ESRF, Grenoble (France) - Chimie
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Bibliographic reference Zarechnaya, E. ; Dubrovinskaia, N. ; Caracas, R. ; Merlini, M. ; Hanfland, M. ; et. al. Pressure-induced isostructural phase transformation in γ -B 28 . In: Physical Review B - Condensed Matter and Materials Physics, Vol. 82, no.18, p. 1-11 (2010)
Permanent URL http://hdl.handle.net/2078/126890