期刊論文
| 學年 | 87 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 1999-01-01 |
| 作品名稱 | Crossover in the attractive one-dimensional Hubbard model for general electron concentrations |
| 作品名稱（其他語言） | |
| 著者 | Kocharian, A. N.; Yang, C.; Chiang, Y. L.; Kioussis, N. |
| 單位 | 淡江大學物理學系 |
| 出版者 | Amsterdam: Elsevier BV * North-Holland |
| 著錄名稱、卷期、頁數 | Physica B: Condensed Matter 259-261, pp.739-741 |
| 摘要 | The crossover and the ground-state properties in the attractive Hubbard model are studied using the exact Bethe-ansatz equations and the self-consistent field (SCF) approach with renormalized chemical potential. The exact and the SCF results for the ground-state energy, the concentration of double occupied sites D, the chemical potential μ and the kinetic energy are in good agreement for all band fillings n and a wide range of the coupling strength -U/t. The SCF theory in one dimension suggests a smooth crossover from the BCS superconductivity to the superfluidity of local pairs under variation of -U/t and n. We found a simple relationship between D, n and the BCS order parameter. |
| 關鍵字 | Attractive Hubbard model;Bethe-ansatz;Self-consistent field;Crossover |
| 語言 | en |
| ISSN | 0921-4526 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | Yang, C |
| 審稿制度 | |
| 國別 | NLD |
| 公開徵稿 | |
| 出版型式 | 紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/72725 ) |