Transport Properties of Vortices in Easy Flow Channels: A Frenkel-Kontorova Study
Transport Properties of Vortices in Easy Flow Channels: A Frenkel-Kontorova Study
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DOI：
10.1103/physrevlett.82.3144
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发表时间：
1999-03
影响因子：
8.6
通讯作者：
R. Besseling;R. Niggebrugge;P. Kes
中科院分区：
文献类型：
--
作者：
R. Besseling;R. Niggebrugge;P. Kes
研究了理想涡格子中的无公度易流动通道。分子动力学模拟和与Frenkel-Kontorova模型的比较表明，沟道内晶格中的相关(点)缺陷导致了几乎为零的临界电流。除了正常的磁通流动行为外，我们还发现在与缺陷运动相关的小驱动器上存在低迁移率区域。对于单个缺陷涡排的情况，我们用解析的方法处理这种情况。我们还简要讨论了它与已有的人工涡道实验的关系。
Incommensurate easy flow channels in an otherwise perfect vortex lattice are investigated. The associated (point) defects in the lattice inside the channel cause an almost vanishing critical current, as shown by molecular dynamics simulations and a comparison with the Frenkel-Kontorova model. In addition to the normal flux flow behavior, we find a low mobility regime at small drives associated with defect motion. We treat this situation analytically for the case of a single defective vortex row. We also briefly discuss the relation to existing experiments on artificial vortex channels.