Flux-flow instability in a strongly disordered superconducting strip with an edge barrier for vortex entry
Flux-flow instability in a strongly disordered superconducting strip with an edge barrier for vortex entry
复制标题
DOI：
10.1088/1361-6668/ab4168
复制
发表时间：
2019-10
影响因子：
3.6
通讯作者：
D. Vodolazov
中科院分区：
文献类型：
--
作者：
D. Vodolazov
本文从理论上研究了置于垂直磁场H中的高度无序超导薄带的磁通流不稳定性。我们发现，在临界电流Ic（H）以上的淬灭电流Iq（H）处，从电阻（磁通流）态到正常态的跃迁开始于超导带边缘附近出现超导性被抑制的局部区域和快速移动的涡旋，涡旋进入超导体，局部电流密度最大。这些区域传播到相对的边缘，形成高电阻的自制类约瑟夫森链接，这是不稳定的，并演变为正常的域，然后沿着沿着超导带扩展。
We theoretically study flux-flow instability in a highly disordered thin superconducting strip placed in a perpendicular magnetic field H. We find that the jump from the resistive (flux-flow) state to the normal one at quenching current Iq(H) above the critical current Ic(H) starts from the appearance of localized regions with suppressed superconductivity and fast-moving vortices near the edge of the strip, where vortices enter the superconductor and local current density is maximal. These regions propagate to the opposite edge and form highly resistive self-made Josephson-like links, which are unstable and evolve to the normal domains, which then expand along the superconducting strip.