Penetration of the magnetic field into the twinning plane in type-I and -II superconductors

Article

关键词: SURFACE-TENSION;   

DOI  :  10.1103/PhysRevB.86.064511

来源: SCIE

【 摘 要 】

It is demonstrated that in the type-I and -II superconductors with weakly transparent twinning planes (TP) the penetration of the external parallel magnetic field into the region of the twinning plane can be energetically favorable. In the type-I superconductors the twinning planes become similar to Josephson junctions and the parallel magnetic field penetrates into the TP in the form of Josephson-like vortices. This leads to an increase in the critical magnetic field values. The corresponding phase diagram in the parameter plane temperature-magnetic field essentially differs from the one obtained without taking the finite value of the magnetic field near the TP into account. A comparison between the obtained phase diagrams and experimental data for different type-I superconductors can allow to estimate the value of the TP transparency, which is the only fitting parameter in our theory.

【 授权许可】

Free