Electronic, vibrational, and thermodynamic properties of ZnS (zincblende and rocksalt structure)

Details Electronic, vibrational, and thermodynamic properties of ZnS (zincblende and rocksalt structure) Electronic, vibrational, and thermodynamic properties of ZnS (zincblende and rocksalt structure)

2009-11-26

arxiv.org/abs/0911.5022v1

Physics

Condensed Matter

Materials Science

33pages, 16 Figures, submitted to Phys. Rev. B

Scientific paper

We have measured the specific heat of zincblende ZnS for several isotopic compositions and over a broad temperature range (3 to 1100 K). We have compared these results with calculations based on ab initio electronic band structures, performed using both LDA and GGA exchange- correlation functionals. We have compared the lattice dynamics obtained in this manner with experimental data and have calculated the one-phonon and two-phonon densities of states. We have also calculated mode Grueneisen parameters at a number of high symmetry points of the Brillouin zone. The electronic part of our calculations has been used to investigate the effect of the 3d core electrons of zinc on the spin-orbit splitting of the top valence bands. The effect of these core electrons on the band structure of the rock salt modification of ZnS is also discussed.

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