期刊論文
| 學年 | 88 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 1999-12-20 |
| 作品名稱 | Bose condensation and electron pairing in one-dimensional Hubbard model |
| 作品名稱（其他語言） | |
| 著者 | Kocharian, A. N.; 楊棨; Yang, Chi; Chiang, Y. L. |
| 單位 | 淡江大學物理學系 |
| 出版者 | World Scientific Publishing |
| 著錄名稱、卷期、頁數 | International Journal of Modern Physics B 13(29-31), pp.3538-3545 |
| 摘要 | The ground-state properties in one-dimensional Hubbard model with on-site attraction and repulsion of electrons in the presence of magnetic field h are calculated by means of the exact Bethe-ansatz formalism and the generalized self-consistent field (GSCF) approach for general electron concentrations n and arbitrary interaction strength. The ground-state properties, including the energy, the average spin (magnetization) and the kinetic energy are compared over a wide range of parameter space. The GSCF theory is in qualitative and in some cases in good quantitative agreement with the exact results. The GSCF theory at U≤0 (or U≥0) differentiates the spin (or charge) energy gap from the BCS (or antiferromagnetic) order parameter and suggests a smooth crossover from the phase with the itinerant BCS-like behavior to the Bose condensation regime of the local pairs. |
| 關鍵字 | Hubbard model;Ground-state;Bethe-ansatz;BCS pairing;Electron-hole pairing;Bose condensation;Crossover |
| 語言 | en |
| ISSN | 0217-9792 |
| 期刊性質 | 國外 |
| 收錄於 | |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | SGP |
| 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/987654321/27500 ) |