论文标题
在固定存在下，具有两倍各向异性的系统中驱动的超导涡流动力学
Driven Superconducting Vortex Dynamics in Systems with Two-Fold Anisotropy in the Presence of Pinning
论文作者
论文摘要
我们检查了超导涡流的动力学，其在随机固定上驱动的两倍各向异性相互作用电位，并比较在驱动器上平行和垂直于各向异性方向的行为。拓扑缺陷的数量达到了最大近距离的最大值，然后随着涡流形成一维链，随着驱动力的增加而下降。这与从固定的nematic转变为与各向异性的软方向对齐的移动近晶型。当沿各向异性的软方向应用驱动器时，通常会更有序，而对于沿着硬方向行驶时，有各向异性的临界值，而该系统与软方向保持一致。我们还观察到动力学的磁滞，在减少驱动驱动器时，一维对准链持续持续，以在驱动器增加的驱动器扫描期间驱动器以下的驱动器以下。在移动状态下，更多各向异性系统具有更多的结构障碍。对于较低的各向异性，系统形成移动的近晶型状态，而在较高的各向异性下，出现了移动的列态。
We examine the dynamics of superconducting vortices with two-fold anisotropic interaction potentials driven over random pinning and compare the behavior under drives applied parallel and perpendicular to the anisotropy direction. The number of topological defects reaches a maximum near depinning and then drops with increasing driving force as the vortices form one-dimensional chains. This coincides with a transition from a pinned nematic to a moving smectic aligned with the soft direction of the anisotropy. The system is generally more ordered when the drive is applied along the soft direction of the anisotropy, while for driving along the hard direction, there is a critical value of the anisotropy above which the system remains aligned with the soft direction. We also observe hysteresis in the dynamics, with one-dimensional aligned chains persisting during a decreasing drive sweep to drives below the threshold for chain formation during the increasing drive sweep. More anisotropic systems have a greater amount of structural disorder in the moving state. For lower anisotropy, the system forms a moving smectic-A state, while at higher anisotropy, a moving nematic state appears instead.
