Details of coexistence of superconducting and antiferromagnetic orders induced by a paramagnetic pair-breaking effect
Details of coexistence of superconducting and antiferromagnetic orders induced by a paramagnetic pair-breaking effect
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顺磁断对效应引起的超导和反铁磁序共存的细节
DOI：
10.1088/1742-6596/592/1/012074
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Y Hatakeyama and R Ikeda
中科院分区：
文献类型：
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作者：
武井 孝行;寺園 圭太;荒木 清貴;大角 義浩;早瀬 元;金森 主祥;中西 和樹;吉田 昌弘;Yuhki Hatakeyama and Ryusuke Ikeda;Y Hatakeyama and R Ikeda
我们从理论上研究了由顺磁断对 (PPB) 效应引起的共存 d x 2-y 2 波超导 (SC) 和反铁磁或自旋密度波 (SDW) 阶次的 k 空间分布。结果表明，SDW 阶数在 SC 节点附近的 k 空间区域中发展，其中 SC 阶数受到 PPB 的抑制，并且由于 d x 2-y 2 波 SC 间隙函数的符号变化，即使在 k 空间中，SC 和 SDW 阶数也会相互增强。基于 SC 和 SDW 阶数在 k 空间中的分布，讨论了费米面曲率较大的情况下 PPB 诱导的 SDW 矩的场依赖性。
We theoretically investigate the k-space distributions of coexisting d x 2-y 2-wave superconducting (SC) and antiferromagnetic or spin-density-wave (SDW) orders induced by the paramagnetic pair-breaking (PPB) effect. It is shown that the SDW order develops in k-space regions near the SC nodes, where the SC order is suppressed by the PPB, and that the SC and SDW orders are enhanced with each other even in k-space owing to the sign change of the d x 2-y 2-wave SC gap function. The field dependence of the PPB-induced SDW moment in the case with a large Fermi surface curvature is discussed based on the distributions of the SC and SDW orders in k-space.