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Exact-exchange density-functional theory for quasi-two-dimensional electron gases
| Content Provider | Semantic Scholar |
|---|---|
| Author | Reboredo, Fernando Agustín Proetto, Cèsar R. |
| Copyright Year | 2002 |
| Abstract | A simple exact-exchange density-functional method for a quasi-two-dimensional electron gas with variable density is presented. An analytical expression for the exact-exchange potential with only one occupied subband is provided, without approximations. When more subbands are occupied the exact-exchange potential is obtained numerically. The theory shows that, in contradiction with LDA, the exact-exchange potential exhibits disconti-nuities and the system suffers a zero-temperature first-order transition each time a subband is occupied. Results suggesting that the translational symmetry might be spontaneously broken at zero temperature are presented. An extension of the theory to finite temperatures allows to describe a drop in the intersubband spacing in good quantitative agreement with recent experiments . |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://arxiv.org/pdf/cond-mat/0211344v1.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Anterior descending branch of left coronary artery Approximation Arabic numeral 0 Density functional theory Electron Exhibits as Topic Experiment First-order predicate Functional theories of grammar Gases Genetic Translation Process Mental Suffering Numerical analysis |
| Content Type | Text |
| Resource Type | Article |
