Spin-triplet superconductivity in repulsive Hubbard models with disconnected Fermi surfaces: a case study on triangular and honeycomb lattices
Spin-triplet superconductivity in repulsive Hubbard models with disconnected Fermi surfaces: a case study on triangular and honeycomb lattices
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具有不连续费米面的排斥哈伯德模型中的自旋三重态超导：三角形和蜂窝晶格的案例研究
DOI：
10.1103/physrevb.63.174507
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发表时间：
2000
影响因子：
3.7
通讯作者：
R. Arita
中科院分区：
文献类型：
--
作者：
K. Kuroki;R. Arita
我们提出自旋涨落介导的自旋三重态超导可以在具有不连通费米表面的排斥性Hubbard模型中实现。利用涨落交换近似对三角形（稀带填充）和蜂窝（近半填充）晶格上的Hubbard模型进行了验证，得到了具有$f\ensuremath{-}\mathrm{w}\mathrm{a}\mathrm{v}\mathrm{e}$对称性的三重态配对序参数。建议可能与实际材料相关。
We propose that spin-fluctuation-mediated spin-triplet superconductivity may be realized in repulsive Hubbard models with disconnected Fermi surfaces. The idea is confirmed for Hubbard models on triangular (dilute band filling) and honeycomb (near half-filling) lattices using fluctuation exchange approximation, where triplet pairing order parameter with $f\ensuremath{-}\mathrm{w}\mathrm{a}\mathrm{v}\mathrm{e}$ symmetry is obtained. Possible relevance to real materials is suggested.