R Venkatesh
Articles written in Pramana – Journal of Physics
Volume 43 Issue 3 September 1994 pp 201-209
This paper is mainly concerned with elastic and acoustic properties of vitrous silica besides the computation of phonon frequencies. Thus the phonon frequencies of vitrous silica have been calculated assuming the electronic bulk modulus,
Volume 43 Issue 5 November 1994 pp 409-409 Erratum
Volume 49 Issue 3 September 1997 pp 269-283
R Venkatesh R V Gopala Rao Sumita Bandyopadhyay
Litov and Anderson after various considerations suggested a four constant potential function for a-Se as well as a-As2S3. Hence we also used a four constant potential function with the sole purpose of applying this potential function to obtain several acoustic, thermodynamic and other properties. We calculated several acoustic properties of a-Se like second order elastic constants (SOECs), their pressure derivatives, the longitudinal and transverse Grüneisen constant by two different methods, phonon frequencies, absorption band position through the use of Nath-Smith-Delaunay’s equation, and the thermodynamic properties like heat capacity, bulk modulus, thermal Grüneisen constant, the pressure derivative of the bulk modulus (d
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