Dynamic response and ordering of rotating vortices in superconducting Corbino disks

被引：17
作者：
Okuma, S. [1 ]
Yamazaki, Y. [1 ]
Kokubo, N. [2 ]
机构：
[1] Tokyo Inst Technol, Res Ctr Low Temp Phys, Meguro Ku, Tokyo 1528551, Japan
[2] Kyushu Univ, Ctr Res & Advancement Higher Educ, Nishi Ku, Fukuoka 8190395, Japan
来源：
PHYSICAL REVIEW B | 2009年 / 80卷 / 22期
关键词：
Corbino effect; flux flow; flux pinning; germanium alloys; laminar flow; molybdenum alloys; plastic flow; superconducting thin films; vortices; VORTEX LATTICE; MODE-LOCKING; TEMPERATURE; TRANSITION; FLOW;
D O I：
10.1103/PhysRevB.80.220501
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the dynamic response of weakly disordered vortex lattice driven by a radial current I in amorphous superconducting films with a Corbino geometry, where vortices rotate around the center of the sample by a frustrated Lorentz force inversely proportional to the radius. With increasing I, the vortices near the center are first depinned, indicative of the plastic-flow-like rotation, which gradually approaches a laminarlike flow at large I. We observe a mode-locking resonance, which suggests the formation of rotating vortex rings composed of triangular-lattice arrays. The field evolution of the resonance shows the presence of the lattice rotation of the driven vortex rings with respect to the flow direction.
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页数：4
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