Speed limit to the Abrikosov lattice in mesoscopic superconductors
Speed limit to the Abrikosov lattice in mesoscopic superconductors
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DOI：
10.1103/physrevb.92.024513
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发表时间：
2015-07-30
影响因子：
3.7
通讯作者：
Silhanek, A. V.
中科院分区：
文献类型：
--
作者：
Grimaldi, G.;Leo, A.;Silhanek, A. V.
研究了具有大Ginzburg-Landau参数的低钉扎材料Mo_3Ge在介观几何中的超导态不稳定性。我们观察到，在电流驱动的开关从Abrikosov通量流的非线性区域的正常状态，平均临界涡旋速度达到了一个极限最大速度作为所施加的磁场的函数。基于含时的Ginzburg-Landau模拟，我们认为所观察到的行为是由于高速涡动力学限制在介观尺度上。我们建立了一个通用的相图，其中包括所有可能的动态配置的Abrikosov晶格在介观超导体。
We study the instability of the superconducting state in a mesoscopic geometry for the low pinning material Mo3Ge characterized by a large Ginzburg-Landau parameter. We observe that in the current-driven switching to the normal state from a nonlinear region of the Abrikosov flux flow, the mean critical vortex velocity reaches a limitingmaximum velocity as a function of the appliedmagnetic field. Based on time-dependent Ginzburg-Landau simulations, we argue that the observed behavior is due to the high-velocity vortex dynamics confined on a mesoscopic scale. We build up a general phase diagram which includes all possible dynamic configurations of the Abrikosov lattice in a mesoscopic superconductor.