Phonon dispersion relations and elastic constants of h.c.p. helium at molar volume of 16 cm 3

The lattice dynamics and the elastic constants of solid helium at the molar volume of 16 cm 3 have been calculated with twelve second order parameters using Keating's approach. The agreement between theory and measurement is as good as that of Reese et.al. who have used the MAS model with eight...

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Bibliographic Details
Published inSolid state communications Vol. 11; no. 9; pp. 1193 - 1195
Main Authors Ramji Rao, R., Menon, C.S.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 1972
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Summary:The lattice dynamics and the elastic constants of solid helium at the molar volume of 16 cm 3 have been calculated with twelve second order parameters using Keating's approach. The agreement between theory and measurement is as good as that of Reese et.al. who have used the MAS model with eighteen parameters to fit their dispersion data. Auf Grundlage der Methode von Keating unter Verwendung von Zwölf Parametern des Zweiten Grades wurden die Gitterkonstanten und die Elastizitätskonstanten von Fest-Helium bei einem Molvolumen von 16 cm 3 errechnet. Die Übereinstimmung zwischen Theorie und Messung ist so gut wie die von Reese und anderen, die das MAS Modell mit 18 Parametern benutzt haben, um ihren Dispersions - Angaben zu entsprechen.
ISSN:0038-1098
1879-2766
DOI:10.1016/0038-1098(72)90822-8