双带超导体中费米速度与愈合长度的相互作用
Interplay of Fermi velocities and healing lengths in two-band superconductors
摘要：
通过数值求解Bogoliubov-de Gennes方程，我们证明了即使在磁场存在的情况下，带间约瑟夫逊耦合几乎为零的情况下，两个贡献凝聚体的愈合长度之间的差异也会受到带费米速度的强烈影响.改变带费米速度的比率改变了冷凝物长度的温度依赖性，并显著地改变了"长度尺度锁定”制度的参数，在该制度下，两个特征长度彼此接近。
英文摘要：
By numerically solving the Bogoliubov-de Gennes equations for the single vortex state in a two-band superconductor, we demonstrate that the disparity between the healing lengths of two contributing condensates is strongly affected by the band Fermi velocities, even in the presence of the magnetic field and far beyond the regime of nearly zero Josephson-like coupling between bands. Changing the ratio of the band Fermi velocities alters the temperature dependence of the condensate lengths and significantly shifts parameters of the ``length-scales locking" regime at which the two characteristic lengths approach one another.
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