超导准晶体中实空间超流分布与反常顺磁响应
Supercurrent Distribution in Real-Space and Anomalous Paramagnetic Response in a Superconducting Quasicrystal
AI总结：
本文通过Bogoliubov-de Gennes平均场理论研究了Ammann-Beenker准周期结构中实空间超流分布，发现抗磁电流局部违反守恒定律需顺磁电流补偿，且顺磁电流表现出与外加矢量势垂直或反向的反常行为。
摘要：
我们在理论上研究了均匀矢量势下二维准周期结构中流动的超流在实空间的分布。通过考虑准周期Ammann-Beenker结构上的吸引Hubbard模型，并在Bogoliubov-de Gennes平均场理论下研究超导相，我们将局部超流分解为顺磁和抗磁分量，数值研究了它们对平均电子密度、温度及外加矢量势角度的依赖关系。我们发现抗磁电流在局部违反电流守恒定律，即使在零温下也需要顺磁电流的补偿。顺磁电流在准周期结构中表现出奇特行为，如局部电流方向与外加矢量势方向垂直或相反。
英文摘要：
We theoretically study the real-space distribution of the supercurrent that flows under a uniform vector potential in a two-dimensional quasiperiodic structure. This is done by considering the attractive Hubbard model on the quasiperiodic Ammann-Beenker structure and studying the superconducting phase within the Bogoliubov-de Gennes mean-field theory. Decomposing the local supercurrent into the paramagnetic and diamagnetic components, we numerically investigate their dependencies on average electron density, temperature, and the angle of the applied vector potential. We find that the diamagnetic current locally violates the current conservation law, necessitating compensation from the paramagnetic current, even at zero temperature. The paramagnetic current shows exotic behaviors in the quasiperiodic structure, such as local currents which are oriented transversally or reversely to that of the applied vector potential.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
