Modulated vortex lattice in high fields and gap nodes
Modulated vortex lattice in high fields and gap nodes
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DOI：
10.1103/physrevb.69.212506
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发表时间：
2004-01
影响因子：
3.7
通讯作者：
R. Ikeda;H. Adachi
中科院分区：
文献类型：
--
作者：
R. Ikeda;H. Adachi
在平行场情形下，研究了具有节d波配对和强Pauli自旋亏损的准二维超导体的平均场涡旋相图，以考察间隙节点（或最小值）对类FFLO涡旋晶格稳定性的影响.我们发现，通过一个启发式的论点和模型计算与四倍各向异性费米速度的FFLO类状态是相对抑制的字段接近节点方向。当综合考虑几个实验结果时，本结果强烈地表明CeCoIn$_5$的配对函数的节点或间隙最小值位于沿着[100]方向。
The mean field vortex phase diagram of a quasi two dimensional superconductor with a nodal d-wave pairing and with strong Pauli spin depairing is examined in the parallel field case in order to examine an effect of gap nodes (or minima) on the stability of a FFLO-like vortex lattice. We find through a heuristic argument and a model calculation with a four-fold anisotropic Fermi velocity that the FFLO-like state is relatively suppressed as the field approaches a nodal direction. When taking account of a couple of experimental results altogether, the present result strongly suggests that a node or gap minimum of the pairing function of CeCoIn$_5$ is located along the [100]-direction.