Local electronic structure of a single magnetic impurity in a superconductor
Local electronic structure of a single magnetic impurity in a superconductor
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DOI：
10.1103/physrevlett.78.3761
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发表时间：
1997-05-12
影响因子：
8.6
通讯作者：
Byers, JM
中科院分区：
文献类型：
--
作者：
Flatte, ME;Byers, JM
我们提出了第一个三维的，自洽计算的电子结构附近的超导体中的强经典磁性杂质。在能隙内发现了半电子半空穴的局域激发态。正频率（类电子）谱权重（或局域态密度）的空间结构可以与负频率（类空穴）谱权重的空间结构有很大不同。首次计算了杂质对能隙以上连续态的影响，获得了较好的光谱分辨率。对于足够强的杂质势，序参量可能在杂质位置改变符号。
We present the first three-dimensional, self-consistent calculation of the electronic structure near a strong classical magnetic impurity in a superconductor. Localized excited states are found within the energy gap which are half electron and half hole. The spatial structure of the positive-frequency (electronlike) spectral weight (or local density of states) can differ strongly from that of the negative frequency (holelike) spectral weight. The effect of the impurity on the continuum states above the energy gap is calculated with good spectral resolution for the first time. For sufficiently strong Impurity potentials, the order parameter may change sign at the impurity site.