论文标题
薄膜和2D Ising超导体中的磁性杂质
Magnetic impurities in thin films and 2D Ising superconductors
论文作者
论文摘要
在超导体中稀释的磁杂质的理论中，所有杂质自旋组件的效果通过单个磁散射速率$γ_\ mathrm {m} $表示。在更现实的环境中，磁性杂质是各向异性的。在这种情况下，三种杂质的三个自旋组分的空间随机性通常会增加不同的散射率$γ_i$（$ i = 1,2,3 $）。我们探讨各向异性磁杂质对2D超导体中平面临界场的影响。我们讨论在没有反转中心的系统中允许的单元，三重态和均值混合订单参数。同样，添加少量的磁性杂质可能会导致单线跨界。在所有情况下，杂质自旋的不同组成部分都会影响磁场 - 温度相图。我们表明，磁杂质的各向异性可以用作非常规三重态或平均混合超导性的探针。
In the theory of dilute magnetic impurities in superconductors, the effect of all impurity spin-components is expressed via a single magnetic scattering rate $Γ_\mathrm{m}$. In a more realistic setting, magnetic impurities are anisotropic. In this case, the spatial randomness of three spin-components of impurities gives rise to generally different scattering rates $Γ_i$ ($i=1,2,3$). We explore the effects of anisotropic magnetic impurities on the in-plane critical field in 2D superconductors. We discuss singlet, triplet and parity-mixed order parameters allowed in systems without the inversion center. Also, the addition of a small amount of magnetic impurities may cause singlet to triplet crossovers. In all cases, different components of impurity spin affect the magnetic field -- temperature phase diagram differently. We show that anisotropy of the magnetic impurities can serve as a probe of unconventional triplet or parity-mixed superconductivity.
