| t-J模型中的超导长程序(英文) |
| |
| 作者姓名： | 苏刚 |
| |
| 作者单位： | 中国科学院研究生院物理教学部 北京 100039 |
| |
| 摘 要： | 严格证明了在任何非零温度下一维和二维窄带 (包括次近邻跳跃等 )t J模型不会呈现出S波最近邻配对、推广的 η配对、广义的离位Q配对和dx2 - y2 波配对的超导长程序.如果在系统的电荷激发谱中存在一个激发能隙,则这些配对长程序在零温下也会被排除掉.我们的结果对任意的J值和任意电子填充都成立.
|
| 关 键 词： | d波 超导 长程序 t-J模型 |
| 收稿时间： | 2000-10-23 |
SUPERCONDUCTING LONG-RANGE ORDER IN THE t-J MODEL |
| |
| Authors: | Su Gang |
| |
| Institution: | Department of Physics, Graduate School, Chinese Academy of Sciences, Beijing 100039 |
| |
| Abstract: | It is show n that the one- and the tw o-dimensional t-J model with narrow bands (including nex t nearest-neig hbor hopping, etc.)does no t exhibit s-wave nearest-neighbor, an ex tended η, the general off-site Q and the dx2 -y2-w ave pairing long-range orders at any nonzero temperature.These pairing long-range orders w ill also be excluded at zero temperature if an ex cited energy gap opens in the charge excitation spect rum of the system.Our result s hold t rue for arbit rary values of J and for any electron f illings. |
| |
| Keywords: | d-wave superconducting long-range order t-J model |
|
| 点击此处可从《》浏览原始摘要信息 |
| 点击此处可从《》下载免费的PDF全文 |
|
