Conditions for nonmonotonic vortex interaction in two-band superconductors

Article

关键词: UPPER CRITICAL-FIELD;    MGB2;   

DOI  :  10.1103/PhysRevB.83.214523

来源: SCIE

【 摘 要 】

We describe a semianalytic approach to the two-band Ginzburg-Landau theory, which predicts the behavior of vortices in two-band superconductors. We show that the character of the short-range vortex-vortex interaction is determined by the sign of the normal domain-superconductor interface energy, in analogy with the conventional differentiation between type I and type II superconductors. However, we also show that the long-range interaction is determined by a modified Ginzburg-Landau parameter kappa*, different from the standard. of a bulk superconductor. This opens the possibility for nonmonotonic vortex-vortex interaction, which is temperature dependent, and can be further tuned by alterations of the material on the microscopic scale.

【 授权许可】

Free