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Spin-resolved impurity resonance states in electron-doped cuprate superconductors

机译:电子掺杂的铜酸盐超导体中自旋分辨的杂质共振态

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摘要

With the aim of understanding the nonmonotonic d_(x~2-y~2)-wave gap, we analyze the local electronic structure near impurities in the electron-doped cuprate superconductors. We find that the local density of states near a nonmagnetic impurity in the scenario of d_(x~2-y~2)-wave superconductivity with higher harmonics is qualitatively different from that obtained from the d_(x~2-y~2)-wave superconductivity coexisting with antiferromagnetic spin-density wave order. We propose that spin-polarized scanning tunneling microscopy measurements can distinguish the two scenarios and shed light on the real physical origin of a nonmonotonic d_(x~2-y~2)-wave gap.
机译:为了理解非单调的d_(x〜2-y〜2)波隙,我们分析了掺杂电子的铜酸盐超导体中杂质附近的局部电子结构。我们发现,在具有高次谐波的d_(x〜2-y〜2)波超导情况下,非磁性杂质附近状态的局部密度在质量上与从d_(x〜2-y〜2)获得的定性不同。波超导性与反铁磁自旋密度波阶共存。我们提出自旋极化扫描隧道显微镜测量可以区分这两种情况,并阐明了非单调d_(x〜2-y〜2)波隙的真实物理成因。

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