Instabilities and disorder-driven first-order transition of the vortex lattice
Instabilities and disorder-driven first-order transition of the vortex lattice
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DOI：
10.1103/physrevlett.85.3712
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发表时间：
2000-10-23
影响因子：
8.6
通讯作者：
Bishop, DJ
中科院分区：
文献类型：
--
作者：
Paltiel, Y;Zeldov, E;Bishop, DJ
在Corbino磁盘的运输研究表明，布拉格玻璃相经历了一级转变成无序固体。这种转变在低场下表现出明显的重入行为。相比之下，在传统的条配置，相变是模糊的注入无序涡旋通过样品的边缘，这导致在通常观察到的涡旋不稳定性和涂抹的峰值效应在NbSe 2晶体。这些功能被发现是缺席的Corbino几何形状中的循环涡流不交叉的样品边缘。
Transport studies in a Corbino disk suggest that the Bragg glass phase undergoes a first-order transition into a disordered solid. This transition shows sharp reentrant behavior at low fields. In contrast, in the conventional strip configuration, the phase transition is obscured by the injection of the disordered vortices through the sample edges, which results in the commonly observed vortex instabilities and smearing of the peak effect in NbSe2 crystals. These features are found to be absent in the Corbino geometry in which the circulating vortices do not cross the sample edges.