d波超导体中的杂质：Kondo效应与STM谱
强关联电子
2007-05-23 v5 超导电性
摘要
我们基于NMR实验的见解，提出了BSCCO超导体中Zn杂质近期STM研究的理论。NMR实验表明Zn附近的Cu离子存在净S=1/2磁矩。我们认为该磁矩的Kondo自旋动力学是微分电导中低偏压峰值的起源，而非纯势散射模型中的共振。我们模型的STM谱在空间和能量上的依赖关系也能拟合实验结果。
引用
@article{arxiv.cond-mat/0007431,
title = {Impurity in a d-wave superconductor: Kondo effect and STM spectra},
author = {Anatoli Polkovnikov and Subir Sachdev and Matthias Vojta},
journal= {arXiv preprint arXiv:cond-mat/0007431},
year = {2007}
}
备注
4 pages, 2 color figures. Found improved saddle-point with d-wave correlations near the impurity; onset of Kondo screening now occurs at a significantly smaller coupling, but there is little qualitative change in other features. Noted connection to STM of Kondo impurities in normal metals. Final version as published