Abstract
We theoretically investigate the k-space distributions of coexisting dx2-y2-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 dx2-y2-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.
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