Peak effect and dynamic melting of vortex matter in NbSe2 crystals.
Peak effect and dynamic melting of vortex matter in NbSe2 crystals.
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DOI：
10.1103/physrevlett.95.177005
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发表时间：
2005-09
影响因子：
8.6
通讯作者：
N. Kokubo;K. Kadowaki;K. Takita
中科院分区：
文献类型：
--
作者：
N. Kokubo;K. Kadowaki;K. Takita
本文报道了在2 H-NbSe_2单晶的峰值效应区附近观察到的涡旋物质锁模现象。的ML功能，使我们不仅可以跟踪如何驱动涡的剪切刚度持续接近第二临界场，但也证明了一个动态的熔化过渡驱动涡在给定的速度。我们观察到的速度依赖的熔化签名的峰值效应制度，这揭示了在小速度的无序诱导的过渡和热诱导的过渡在大速度之间的交叉。这揭示了峰效应和热熔融之间的关系。
We present a mode locking (ML) phenomenon of vortex matter observed around the peak effect regime of 2H-NbSe2 pure single crystals. The ML features allow us not only to trace how the shear rigidity of driven vortices persists on approaching the second critical field, but also to demonstrate a dynamic melting transition of driven vortices at a given velocity. We observe the velocity dependent melting signatures in the peak effect regime, which reveal a crossover between the disorder-induced transition at small velocity and the thermally induced transition at large velocity. This uncovers the relationship between the peak effect and the thermal melting.