| Dynamics of vortex–antivortex pair in a superconducting thin strip with narrow slits |
| |
| 引用本文： | 何安,薛存,周又和.Dynamics of vortex–antivortex pair in a superconducting thin strip with narrow slits[J].中国物理 B,2017,26(4):47403-047403. |
| |
| 作者姓名： | 何安 薛存 周又和 |
| |
| 作者单位： | 1.College of Science, Chang'an University, Xi'an 710064, China;2.School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an 710072, China;3.School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China;4.Key Laboratory of Mechanics on Disaster and Environment in Western China attached to the Ministry of Education of China, and Department of Mechanics and Engineering Sciences, Lanzhou University, Lanzhou 730000, China |
| |
| 基金项目： | Project supported by the Fundamental Research Funds for the Central Universities, China (Grant Nos. 310812171011 and G2016KY0305), the National Natural Science Foundation of China (Grant No. 11421062), and the National Key Project of Magneto-Constrained Fusion Energy Development Program, China (Grant No. 2013GB110002). |
| |
| 摘 要： | In the framework of phenomenological time-dependent Ginzburg-Landau(TDGL) formalism,the dynamical properties of vortex-antivortex(V-Av) pair in a superconductor film with a narrow slit was studied.The slit position and length can have a great impact not only on the vortex dynamical behavior but also the current-voltage(Ⅰ-Ⅴ) characteristics of the sample.Kinematic vortex lines can be predominated by the location of the slit.In the range of relatively low applied currents for a constant weak magnetic field,kinematic vortex line appears at right or left side of the slit by turns periodically.We found such single-side kinematic vortex line cannot lead to a jump in the Ⅰ-Ⅴ curve.At higher applied currents the phase-slip lines can be observed at left and right sides of the slit simultaneously.The competition between the vortex created at the lateral edge of the sample and the V-Av pair in the slit will result in three distinctly different scenarios of vortex dynamics depending on slit length:the lateral vortex penetrates the sample to annihilate the antivortex in the slit;the V-Av pair in the slit are driven off and expelled laterally;both the lateral vortex and the slit antivortex are depinned and driven together to annihilation in the halfway.
|
| 收稿时间： | 2016-11-04 |
Dynamics of vortex-antivortex pair in a superconducting thin strip with narrow slits |
| |
| Institution: | 1.College of Science, Chang'an University, Xi'an 710064, China;2.School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an 710072, China;3.School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China;4.Key Laboratory of Mechanics on Disaster and Environment in Western China attached to the Ministry of Education of China, and Department of Mechanics and Engineering Sciences, Lanzhou University, Lanzhou 730000, China |
| |
| Abstract: | In the framework of phenomenological time-dependent Ginzburg-Landau (TDGL) formalism, the dynamical properties of vortex-antivortex (V-Av) pair in a superconductor film with a narrow slit was studied. The slit position and length can have a great impact not only on the vortex dynamical behavior but also the current-voltage (I-V) characteristics of the sample. Kinematic vortex lines can be predominated by the location of the slit. In the range of relatively low applied currents for a constant weak magnetic field, kinematic vortex line appears at right or left side of the slit by turns periodically. We found such single-side kinematic vortex line cannot lead to a jump in the I-V curve. At higher applied currents the phase-slip lines can be observed at left and right sides of the slit simultaneously. The competition between the vortex created at the lateral edge of the sample and the V-Av pair in the slit will result in three distinctly different scenarios of vortex dynamics depending on slit length: the lateral vortex penetrates the sample to annihilate the antivortex in the slit; the V-Av pair in the slit are driven off and expelled laterally; both the lateral vortex and the slit antivortex are depinned and driven together to annihilation in the halfway. |
| |
| Keywords: | vortex-antivortex pair phase-slip line current-voltage characteristic narrow slit |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|
