E2g phonon and the elastic constant C44 in hexagonal van der Waals bonded solids

H. Olijnyk; A. P. Jephcoat

doi:10.1088/0953-8984/12/50/305

E_2g phonon and the elastic constant C₄₄ in hexagonal van der Waals bonded solids

H. Olijnyk, A. P. Jephcoat

Institute for Planetary Materials

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

15 Citations (Scopus)

Abstract

A simple relation between the frequency of E_2g phonon modes and the elastic constant C₄₄, derived previously for hexagonal-close-packed metals, is found to be reasonably valid for crystals of solid He, H₂, D₂ and N₂ at or near normal pressure. Good agreement at high pressure for n-H₂ suggests that the connection between C₄₄ and the phonon frequency also holds over a wide compressional range.

Original language	English
Pages (from-to)	10423-10428
Number of pages	6
Journal	Journal of Physics Condensed Matter
Volume	12
Issue number	50
DOIs	https://doi.org/10.1088/0953-8984/12/50/305
Publication status	Published - Dec 18 2000

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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abstract = "A simple relation between the frequency of E2g phonon modes and the elastic constant C44, derived previously for hexagonal-close-packed metals, is found to be reasonably valid for crystals of solid He, H2, D2 and N2 at or near normal pressure. Good agreement at high pressure for n-H2 suggests that the connection between C44 and the phonon frequency also holds over a wide compressional range.",

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AB - A simple relation between the frequency of E2g phonon modes and the elastic constant C44, derived previously for hexagonal-close-packed metals, is found to be reasonably valid for crystals of solid He, H2, D2 and N2 at or near normal pressure. Good agreement at high pressure for n-H2 suggests that the connection between C44 and the phonon frequency also holds over a wide compressional range.

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