Physics – Condensed Matter
Scientific paper
1998-06-17
Physics
Condensed Matter
24 Pages, RevTex, 3 postscript figures (included), to appear in Phys. Rev. B, Aug 15, 98
Scientific paper
10.1103/PhysRevB.58.4325
A recently proposed ab initio Hartree-Fock approach aimed at directly obtaining the Wannier functions of a crystalline insulator is applied to polymers. The systems considered are the LiH chain and trans-polyacetylene. In addition to being the first application of our approach to one-dimensional systems, this work also demonstrates its applicability to covalent systems. Both minimal as well as extended basis sets were employed in the present study and excellent agreement was obtained with the Bloch orbital based approaches. Cohesive energies, optimized lattice parameters and the band structure are presented. Localization characteristics of the Wannier functions are also discussed.
Dolg Michael
Shukla Alok
Stoll Hermann
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