Variational cluster study of antiferromagnetism and d-wave superconductivity in layered organic superconductors

被引：0
|
作者：
Sahebsara, P. [1 ,2 ]
Senechal, D. [1 ,2 ]
机构：
[1] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada
[2] Univ Sherbrooke, Regroupement Quebecois Sur Les Materiaux Point, Sherbrooke, PQ J1K 2R1, Canada
来源：
LECTURES ON THE PHYSICS OF STRONGLY CORRELATED SYSTEMS XI | 2007年 / 918卷
关键词：
Hubbard model; superconductivity; antiferromagnetism; Mott transition; VCA; BEDT;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The interplay between the antiferromagnetism and d-wave superconductivity of kappa(ET)(2)X conductors has been investigated by the variational cluster approach (VCA), based on self-energy-functional approach. The dimer Hubbard model has been studied as a function of the on-site repulsion U and diagonal hopping amplitude t'. Our zero-temperature calculations show a transition from Neel antiferromagnetism to a spin-liquid phase at around t' similar to 0.9. At weak coupling we find d-wave superconductivity. and a transition between d(x)2-(y)2 and d(xy) pairing symmetry as U decreases.
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页码：322 / +
页数：2
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