Pinning-induced transition to disordered vortex phase in layered superconductors
Pinning-induced transition to disordered vortex phase in layered superconductors
复制标题
层状超导体中钉扎诱导的无序涡旋相转变
DOI：
10.1103/physrevb.57.8026
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发表时间：
1998
影响因子：
3.7
通讯作者：
V. Vinokur
中科院分区：
文献类型：
--
作者：
A. Koshelev;V. Vinokur
随机点钉扎破坏涡旋晶格被认为是在弱耦合层状高温超导体中实验观察到的“第二峰”转变的机制。分离的拓扑有序准晶格的非晶涡旋配置的过渡字段的强烈影响的分层结构和由于磁层间耦合的涡旋倾斜能量的非局部性质。我们发现了三种不同的过渡制度，这取决于约瑟夫森和磁耦合的相对强度。这些制度可以区分的过渡场的超导参数和钉扎强度的依赖性。@S0163-1829~98！04014-4#
Destruction of the vortex lattice by random point pinning is considered as a mechanism of the ‘‘second peak’’ transition observed experimentally in weakly coupled layered high-temperature superconductors. The transition field separating the topologically ordered quasilattice from the amorphous vortex configuration is strongly influenced by the layered structure and by the nonlocal nature of the vortex tilt energy due to the magnetic interlayer coupling. We found three different regimes of transition depending on the relative strength of the Josephson and magnetic couplings. The regimes can be distinguished by the dependence of the transition field on the superconductor parameters and pinning strength. @S0163-1829~98!04014-4#