P Derollez et al 1999 J. Phys.: Condens. Matter 11 3987 doi:10.1088/0953-8984/11/20/305
Lattice dynamics in copper indium diselenide by inelastic neutron scattering
P Derollez
, R Fouret, A Laamyem, B Hennion
and J Gonzalez§
The phonon dispersion curves along the [100] and [001] directions of CuInSe2 have been measured by inelastic neutron scattering. The neutron measurements reveal the uncertainty of optical measurements because of the large absorption of this material. The lattice dynamics is analysed with a rigid ion model: Born-von Karman short range interactions associated with long range electrostatic forces. The calculated dispersion curves are in good agreement with the experiment. The atomic displacements associated with each vibrational mode are used to discuss the optical phonons. The obtained results provide a strong experimental basis from which we can validate the ab initio methods.
- PACS
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63.20.D- Phonon states and bands, normal modes, and phonon dispersion
61.05.fg Neutron scattering (including small-angle scattering)
- Subjects
- Dates
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Issue 20 (24 May 1999)
Received 15 December 1998, in final form 17 March 1999
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Lattice dynamics in copper indium diselenide by inelastic neutron scattering
P Derollez et al 1999 J. Phys.: Condens. Matter 11 3987
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