Perturbation and density-gradient expansions in D dimensions
- 1 May 1994
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Part B
- Vol. 69 (5) , 787-798
- https://doi.org/10.1080/01418639408240148
Abstract
Electron or hole inhomogeneous liquids in two dimensions are currently of considerable interest for condensed-matter studies. This has motivated the generalization of density matrix perturbative calculations based on plane waves, already made in three dimensions, to D dimensions. A similar generalization has been effected for the gradient expansion of the kinetic energy density. In two dimensions, the early work of Lennard-Jones and Woods on a model crystal of hydrocarbons is left largely intact by the inclusion of gradient corrections.Keywords
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