| 题名: | Induced magnetization and inhomogeneous superconductivity in presence of external magnetic field |
| 作者: | Yang C
Kocharian AN
Chiang YL |
| 贡献者: | 物理系 |
| 关键词: | Hubbard model
phase diagram
inhomogeneous superconductivity |
| 日期: | 2001 |
| 上传时间: | 2009-12-11 11:13:10 (UTC+8) |
| 摘要: | Thermodynamic characteristics of the one-dimensional attractive Hubbard model are calculated by means of the generalized self-consistent field (GSCF) approach for a wide range of interaction strength U less than or equal to, 0, in the presence of external magnetic field h greater than or equal to 0, temperature T greater than or equal to 0 and electron concentration 0 less than or equal to n less than or equal to 1. The GSCF theory shows a sharp transition driven by h > 0 and T from the uniform superconducting state into a spatially inhomogeneous state in which the order parameter Delta ((-))(q) has wave vector (0 < \q \ less than or equal to pi). The concentration of double occupied sites and the bound electron pairs with opposite spins n(pair) are calculated and we found a simple relationship between the order parameters Delta ((-))(q) and average spin s, valid for the arbitrary U, all n and h. (C) 2001 Published by Elsevier Science B.V. |
| 關聯: | PHYSICA C Volume: 364 Pages: 155-157 |
| 显示于类别: | [Department of Physics ] journal articles
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