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Phase diagram of a d-wave superconductor with Anderson impurities

机译:具有安德森杂质的d波超导体的相图

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We present a self-consistent solution for a model of a d-wave superconductor with finite concentration of Anderson impurities at zero temperature using the slave boson method. We show how the phase diagram depends on the strength of interaction between impurity and extended states. For fixed impurity level energy E_0 in the Kondo limit there is one superconducting-normal-state transition for all impurity concentrations n. When E_0 is close the Fermi energy there are three such transitions for impurity concentration exceeding certain minimum value n(Γ_0,E_0). If hybridization Γ_0 is fixed and the depth of the impurity level is varied, there are always two transitions for concentration above n(Γ_0,E_0).
机译:我们使用从玻色子方法为零温度下有限浓度安德森杂质的d波超导体模型提供了一个自洽解决方案。我们展示了相图如何取决于杂质和扩展态之间相互作用的强度。对于近藤极限中的固定杂质能级E_0,对于所有杂质浓度n都有一个超导常态跃迁。当E_0接近费米能量时,对于杂质浓度超过某个最小值n(Γ_0,E_0)的三个跃迁。如果杂化Γ_0固定且杂质水平的深度发生变化,则浓度大于n(Γ_0,E_0)始终存在两个跃迁。

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