Dynamic quantum melting and novel insulating phase in superconducting vortex solid

我们观察到快速驱动涡晶格的本征熔化。例如，在零钉住极限下的超导体中的动态熔化。随着温度T的降低，与静态熔化场相比，动态熔化场B c， dyn(T)对T的依赖性变得非常弱，B c, dyn(T)明显受到抑制。这是第一次观察到动态量子熔化跃迁。虽然还没有发现新的绝缘相，但与此问题相关的是，已经揭示了当速度超过某一临界值时，流动涡晶格的晶格取向会发生旋转。从这一结果，首次证明了准粒子生命时间的微观机制支配着涡旋动力学的宏观行为。

We observe intrinsic melting of fast driven vortex lattice(i. e., dynamic melting) in a superconductor in the limit of zero pinning. With decreasing temperature T, the T dependence of a dynamic melting field B c, dyn(T) becomes very weak and B c, dyn(T) is significantly suppressed compared to a static melting field. This is the first observation of a dynamic quantum melting transition. Although novel insulating phases have not yet been found, related to this issue, it has been revealed that the lattice orientation of the flowing vortex lattice rotates as the velocity exceeds a certain critical value. From this result, it has been first demonstrated that a microscopic mechanism of a quasi-particle life time dominates a macroscopic behavior of vortex dynamics.