| Автор | A. Dobry |
| Автор | A. Greco |
| Автор | J. Lorenzana |
| Автор | J. Riera |
| Автор | H. T. Diep |
| Дата выпуска | 1994-09-10 |
| dc.description | The effects of electron-lattice coupling in a multiband Hubbard model are investigated by exact diagonalization. For a system with one doped hole, and with parameters relevant to cuprate superconductors, we find a continuous transition from a delocalized to a small polaron state at a critical value of the electron-phonon interaction. We characterize this state as a Zhang-Rice singlet with distortions in the CuO<sub>4</sub> cluster. We find, in addition, a polaronic shift of the band near the Fermi level in the spectral function of the system. An enhancement of the transfer of the low-energy spectral weight is also observed. These results are in qualitative agreement with different spectroscopic measurements for high-T<sub>c</sub> superconductors. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Effects of Polaronic States in the Multiband Hubbard Model |
| Тип | lett |
| DOI | 10.1209/0295-5075/27/8/011 |
| Electronic ISSN | 1286-4854 |
| Print ISSN | 0295-5075 |
| Журнал | EPL (Europhysics Letters) |
| Том | 27 |
| Первая страница | 617 |
| Последняя страница | 622 |
| Выпуск | 8 |
