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
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), Tc(H) and jc(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.
Fund: 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).
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 2022 Chin. Phys. B 31 037405
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