A study of elastic constants and photon eigenvalues of amorphous As2S3

Gopala Rao, R. V. ; Venkatesh, R. (1996) A study of elastic constants and photon eigenvalues of amorphous As2S3 Journal of Non Crystalline Solids, 195 (3). pp. 286-292. ISSN 0022-3093

Full text not available from this repository.

Official URL: http://linkinghub.elsevier.com/retrieve/pii/002230...

Related URL: http://dx.doi.org/10.1016/0022-3093(95)00545-5


Both the longitudinal, ωL(k), and the transverse, ωT(k), of phonon frequencies of As2S3 are found to be nearly linear up to the near maximum. The first peak in ωL(k) is found to be near 1.7 Å-1 while, in S(k), the major peak is found to occur at 3.5 Å-1 which is nearly twice the first peak maximum value in ωL(k). It is an important result, but this result is difficult to interpret. The γgL and γgT values, as calculated from Schofield's and Bhatia-Singh's parameter, are found to be in good agreement with that of Brugger and Fritz. The band absorption position calculated from elastic constants and Bhatia Singh's parameters are in good agreement with experiments. The third order elastic constants calculated through Siren's non-linear parameter agree well with literature values. The calculated value of the pressure derivative of the bulk modulus from compressibility equation of state is found to be in satisfactory agreement with experiments.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:23930
Deposited On:01 Dec 2010 12:54
Last Modified:02 Jun 2011 08:45

Repository Staff Only: item control page