Theory on Superconductivity of CeIn3 in Heavy Fermion System
Theory on Superconductivity of CeIn3 in Heavy Fermion System
复制标题
重费米子体系中CeIn3超导理论
DOI：
10.1143/jpsj.72.2449
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发表时间：
2003
影响因子：
1.7
通讯作者：
K. Yamada
中科院分区：
文献类型：
--
作者：
H. Fukazawa;K. Yamada
在三维Hubbard模型的基础上，用三阶微扰理论研究了CeIn 3在高压下的超导机制.在这里，我们提出了由反铁磁自旋涨落诱导的d波配对态.对于相同的U / W（W =带宽）值，所估计的超导转变温度比二维系统的超导转变温度低一个数量级。该结果与CeIn 3和CeRhIn 5之间的差异一致。
On the basis of a three-dimensional Hubbard model, the superconducting mechanism of CeIn 3 under high pressure is investigated by the third-order perturbation theory with respect to the on-site Coulomb interaction U . Here we propose the d -wave pairing state induced by antiferromagnetic spin fluctuations. The estimated superconducting transition temperature is lower by one order than that in the two-dimensional system for the same value of U / W ( W = bandwidth). This result is consistent with the difference between CeIn 3 and CeRhIn 5 .