Theory of an inherent spin-density-wave instability due to vortices in superconductors with strong Pauli effects
Theory of an inherent spin-density-wave instability due to vortices in superconductors with strong Pauli effects
复制标题
具有强泡利效应的超导体中的涡流导致固有自旋密度波不稳定性的理论
DOI：
10.1103/physrevb.83.140503
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发表时间：
2011
影响因子：
3.7
通讯作者：
K.Machida
中科院分区：
文献类型：
--
作者：
K.M.Suzuki;M.Ichioka;K.Machida
提出了一种在磁场作用下涡旋增强的自旋密度波（SDW）不稳定性机制来解释CeCoIn中的高场低温相。在涡旋态中，强的泡利效应和节隙共同作用，使动量分辨态密度仅沿沿着节向增加到高于正常态的值，从而为SDW提供了一个有利的嵌套条件。我们可以一致地理解场致SDW局限于下面的观测之谜，如指向节方向与无关，SDW在倾斜场下从平面减小，以及SDW过渡线具有正斜率等事实。
A spin-density-wave (SDW) instability mechanism enhanced by vortices under fields is proposed to explain the high field and low-temperature phase in CeCoIn. In the vortex state strong Pauli effect and nodal gap conspire to enhance the momentum-resolved density of states over the normal state value exclusively along the nodal direction, providing a favorable nesting condition for SDW withonly at high fields (). We can consistently understand observed mysteries of the field-induced SDW confined below, such as facts thatis directed to the nodal direction independent of, SDW diminishes under tilting field from theplane, and the SDW transition line inhas a positive slope.