论文标题
超导性对BCS超导体嵌入量子杂质的磁矩的影响
Influence of superconductivity on the magnetic moment of quantum impurity embedded in BCS superconductor
论文作者
论文摘要
我们研究了超导性对嵌入在S-Wave Bardeen-Cooper-Schrieffer（BCS）超导介质中的单层量子杂质的局部磁矩形成的影响，由单个Imprity Anderson Hamiltonian建模。我们将Bogoliubov的转换与Green的功能方法结合在一起，在自洽的Hartree-fock平均场近似中，以分析金属（在超导下）中所需的条件，以形成低频率限制$ | | | | em | | em | em | <<Δ_{sc} $ gapuctuct $ gap $ gap的磁力位点的磁矩。我们已经将这些结果与其他理论结果进行了比较，并将单位量子杂质嵌入在正常金属宿主中。进一步，我们分析了具有有限超导间隙的超导宿主中嵌入在超导宿主中的量子杂质的电子光谱密度，以研究亚间隙状态作为杂质参数的函数。
We study the influence of superconductivity on the formation of the localized magnetic moment for a single-level quantum impurity embedded in an s-wave Bardeen-Cooper-Schrieffer (BCS) superconducting medium, modeled by single-impurity Anderson Hamiltonian. We have combined Bogoliubov transformation with Green's function method within self-consistent Hartree-Fock Mean Field approximation to analyze the conditions necessary in metal (in the superconducting) for the formation of the magnetic moment at the impurity site for the low-frequency limit $|ω|<<Δ_{sc}$ as well as for the finite superconducting gap $Δ_{sc}$. We have compared these results with other theoretical results and with the single-level quantum impurity embedded in the normal metallic host. Further we analyze the electronic spectral density of the quantum impurity embedded in superconducting host with the finite superconducting gap to study the sub-gap states as a function of impurity parameters.
