## Abstract Alternant molecular orbitals for the lithium metal are constructed in different ways. The corresponding first‐order density matrix is calculated for different shapes of the Fermi surface. Numerical methods to calculate the first‐order density matrix are described.
✦ LIBER ✦
A study of the AMO method as applied to the lithium metal. III. A method for calculating the total electronic energy of crystals in the LCAO approximation
✍ Scribed by Gunnar Sperber
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- English
- Weight
- 431 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0020-7608
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✦ Synopsis
Abstract
A method is given for accurate calculation of the expectation value of the Hamiltonian of a crystal with respect to a single‐determinant wave function of LCAO type. The method is partly based on numerical integration over one Wigner‐Seitz cell. In principle, the calculations involve infinite summations over lattice sites; suitable truncation methods are devised.
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