Wire network behavior of superconducting films with lower symmetrical mesoscopic hole arrays

doi:10.1088/1674-1056/ac43af

中国物理B ›› 2022, Vol. 31 ›› Issue (3): 37405-037405.doi: 10.1088/1674-1056/ac43af

Wire network behavior of superconducting films with lower symmetrical mesoscopic hole arrays

Wei-Gui Guo(郭伟贵)^1,2, Zi-Xi Pei(裴子玺)^1,2, and Xiang-Gang Qiu(邱祥冈)^1,2,3,†

1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Collaborative Innovation Center of Quantum Matter, Beijing 100084, China

收稿日期:2021-11-22 修回日期:2021-12-10 接受日期:2021-12-16 出版日期:2022-02-22 发布日期:2022-02-24
通讯作者: Xiang-Gang Qiu E-mail:xgqiu@iphy.ac.cn
基金资助:
X.G.Q. acknowledges the support from the National Natural Science Foundation of China (Grant Nos. 11974412 and 11774400) and the National Key R&D Program of China (Grant Nos. 2017YFA0302903 and 2018YFA0305703).

Wire network behavior of superconducting films with lower symmetrical mesoscopic hole arrays

Wei-Gui Guo(郭伟贵)^1,2, Zi-Xi Pei(裴子玺)^1,2, and Xiang-Gang Qiu(邱祥冈)^1,2,3,†

1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Collaborative Innovation Center of Quantum Matter, Beijing 100084, China

Received:2021-11-22 Revised:2021-12-10 Accepted:2021-12-16 Online:2022-02-22 Published:2022-02-24
Contact: Xiang-Gang Qiu E-mail:xgqiu@iphy.ac.cn
Supported by:
X.G.Q. acknowledges the support from the National Natural Science Foundation of China (Grant Nos. 11974412 and 11774400) and the National Key R&D Program of China (Grant Nos. 2017YFA0302903 and 2018YFA0305703).

摘要/Abstract

摘要： Superconducting films with the same hole density but different geometric symmetry have been designed and fabricated. The R(H) curves show obvious periodic oscillations with several dips at fractional matching fields. It is found that the period of the oscillations in the low field is not necessary equal to that derived from the hole density, but consistent with that from the corresponding wire networks when the large disk-like film regions are regarded as nodes. The experimental results of R(H), T_c(H) and j_c(H) at fractional matching fields within the first oscillation also support the rationality of considering films with large-diametered hole arrays as wire networks. Our results demonstrate that the connectivity of superconducting films with large-diametered hole arrays plays a more important role in the oscillations of R(H) curves.

关键词: fluxoid quantization, wire network, matching effect

Abstract: Superconducting films with the same hole density but different geometric symmetry have been designed and fabricated. The R(H) curves show obvious periodic oscillations with several dips at fractional matching fields. It is found that the period of the oscillations in the low field is not necessary equal to that derived from the hole density, but consistent with that from the corresponding wire networks when the large disk-like film regions are regarded as nodes. The experimental results of R(H), T_c(H) and j_c(H) at fractional matching fields within the first oscillation also support the rationality of considering films with large-diametered hole arrays as wire networks. Our results demonstrate that the connectivity of superconducting films with large-diametered hole arrays plays a more important role in the oscillations of R(H) curves.

Key words: fluxoid quantization, wire network, matching effect

中图分类号: (Vortex phases (includes vortex lattices, vortex liquids, and vortex glasses))

74.25.Uv

74.78.Na (Mesoscopic and nanoscale systems) 81.16.Rf (Micro- and nanoscale pattern formation)

Wei-Gui Guo(郭伟贵), Zi-Xi Pei(裴子玺), and Xiang-Gang Qiu(邱祥冈). Wire network behavior of superconducting films with lower symmetrical mesoscopic hole arrays[J]. 中国物理B, 2022, 31(3): 37405-037405.

Wei-Gui Guo(郭伟贵), Zi-Xi Pei(裴子玺), and Xiang-Gang Qiu(邱祥冈). Wire network behavior of superconducting films with lower symmetrical mesoscopic hole arrays[J]. Chin. Phys. B, 2022, 31(3): 37405-037405.

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Wire network behavior of superconducting films with lower symmetrical mesoscopic hole arrays

Wire network behavior of superconducting films with lower symmetrical mesoscopic hole arrays

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