Performance of Thomas–Fermi and linear response approaches in periodic two-dimensional systems
| Autor: | M J Stott, L Calderín |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Statistics and Probability
Small number Linear system General Physics and Astronomy Statistical and Nonlinear Physics Geometry Density distribution Impurity Modeling and Simulation Quantum mechanics Total energy Periodic model Unit (ring theory) Mathematical Physics Mathematics Fermi Gamma-ray Space Telescope |
| Zdroj: | Journal of Physics A: Mathematical and Theoretical. 43:155203 |
| ISSN: | 1751-8121 1751-8113 |
| Popis: | A study of the performance of Thomas–Fermi and linear response theories in the case of a two-dimensional periodic model system is presented. The calculated density distribution and total energy per unit cell compare very well with exact results except when there is a small number of particles per cell, even though the potential has narrow tight-binding bands. The results supplement earlier findings of Koivisto and Stott for a localized impurity in a two-dimensional uniform gas. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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