d-wave pairing in the presence of long-range Coulomb interactions

被引：23
|
作者：
Esirgen, G [1 ]
Schüttler, HB
Bickers, NE
机构：
[1] Univ Georgia, Dept Phys & Astron, Ctr Simulat Phys, Athens, GA 30602 USA
[2] Univ So Calif, Dept Phys & Astron, Los Angeles, CA 90089 USA
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 06期
关键词：
D O I：
10.1103/PhysRevLett.82.1217
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The one-band extended Hubbard model in two dimensions near band-filling 1/2 is solved in the fluctuation exchange approximation, including the long-range (1/r) part of the Coulomb interaction, up to 4th-neighbor distance. Our results suggest that d(x2-y2) pairing in the Hubbard model is robust against the inclusion of long-range Coulomb interactions with moderate Ist-neighbor repulsion strength V-1. d(x)(-y)(2)(2) pairing is suppressed only at large V-1 (greater than or similar to 0.25U-0.4U), due to incipient charge density wave instabilities, [S0031-9007(99)08367-7].
引用
收藏
页码：1217 / 1220
页数：4
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