Pairing due to spin fluctuations in layered organic superconductors

被引:206
作者
Schmalian, J [1 ]
机构
[1] Univ Illinois, Loomis Lab Phys, Urbana, IL 61801 USA
关键词
D O I
10.1103/PhysRevLett.81.4232
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
I show that, for a kappa-type organic (BEDT-TTF)(2)X molecular crystal, a superconducting state with T-c approximate to 10 K and gap nodes on the Fermi surface can be caused by short-ranged antiferromagnetic spin fluctuations. Using a two-band description for the antibonding orbitals on a BEDT-TTF dimer of the kappa-type salt, and an intermediate local Coulomb repulsion between two holes on one dimer, the magnetic interaction and the superconducting gap function are determined self consistently within the fluctuation-exchange approximation. The pairing interaction is predominantly caused by interband coupling and additionally affected by spin excitations of the quasi-one-dimensional band.
引用
收藏
页码:4232 / 4235
页数:4
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