Electron Phonon Interaction In Hubbard Model

被引：0
|
作者：
Nath, S. [1 ]
Mondal, N. S. [1 ]
Ghosh, N. K. [1 ]
Bhowmick, S. K. [1 ]
机构：
[1] Univ Kalyani, Dept Phys, Kalyani 741235, W Bengal, India
来源：
SOLID STATE PHYSICS, VOL 57 | 2013年 / 1512卷
关键词：
High-Tc Superconductivity; Hubbard model; electron phonon interaction; HIGH-TEMPERATURE SUPERCONDUCTORS; T-J MODEL; MEDIATED INTERACTION;
D O I：
10.1063/1.4791422
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Hubbard model having on-site electron-phonon interaction and inter-site phonon mediated interaction has been studied by exact diagonalization method. Results show that on-site electron-phonon interaction generates an effective attraction between electrons which eventually forms on-site bipolaron. On the other hand, phonon mediated interaction between electrons at nearest-neighbor sites is suppressed by on-site Coulomb repulsion initially, but at a certain larger strength, both on-site and neighboring site electron-phonon coupling occurs.
引用
收藏
页码：1084 / 1085
页数：2
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