| Autor: |
D. E. Heim, Steven A. Kivelson |
| Rok vydání: |
1982 |
| Předmět: |
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| Zdroj: |
Physical Review B. 26:4278-4292 |
| ISSN: |
0163-1829 |
| DOI: |
10.1103/physrevb.26.4278 |
| Popis: |
We have considered the competing effects of the electron-electron Hubbard repulsion and the electron-phonon interaction on the properties of a one-dimensional electron gas both within perturbation theory and by exact numerical solution of finite-length rings. We find that the perturbation-theory results provide a qualitatively correct description of the system over a considerable range of parameters. Among the more interesting conclusions we draw is that, so long as the repulsion $U$ is less than a critical value which depends on the strength of the electron-phonon interaction, the predictions of the Su-Schrieffer-Heeger model of polyacetylene are not profoundly affected by the electron-electron repulsion. A small splitting between the charged and neutral soliton-creation energies and minor shape changes are the principle effects. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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