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Transport through a network of two-dimensional NbC superconducting crystals connected via weak links
Hao, Meng1,2; Xu, Chuan3; Liu, Zhen1,2; Wang, Cheng1,2; Liu, Zhibo3; Sun, Su3; Cheng, Hui-Ming3; Ren, Wencai3; Kang, Ning1,2
Corresponding AuthorRen, Wencai(wcren@imr.ac.cn) ; Kang, Ning(nkang@pku.edu.cn)
2020-03-23
Source PublicationPHYSICAL REVIEW B
ISSN2469-9950
Volume101Issue:11Pages:7
AbstractRecent progresses in the growth and fabrication techniques for preparing crystalline two-dimensional (2D) superconductors have stimulated intense interest in the studies of the electronic properties of these systems. Here we investigate the superconducting transport properties based on chemical vapor deposition-grown thin NbC crystals consisting of network structures. The 2D character of the superconductivity in individual NbC crystals is revealed by examining the angular dependence of magnetotransport measurements. At low temperatures, the samples show nonmonotonic double-step superconducting transitions as a function of temperature and magnetic field. We demonstrate that the observed transport characteristics can be understood in terms of coupled Josephson junctions forming between isolated NbC crystals, including the effects of Josephson and quasiparticle tunneling. In particular, detailed analysis of the magnetic field-driven transition suggests the existence of quantum flux-creep regime at low temperatures and small magnetic fields in such thin NbC superconducting crystals. Our work underlines the importance of the morphology on the transport properties of 2D superconducting crystals, providing a comprehensive understanding of crystalline 2D superconductors.
Funding OrganizationNational Natural Science Foundation of China ; National Key Research and Development Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Youth Innovation Promotion Association of Chinese Academy of Sciences
DOI10.1103/PhysRevB.101.115422
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[11774005] ; National Natural Science Foundation of China[11974026] ; National Natural Science Foundation of China[51521091] ; National Natural Science Foundation of China[51802314] ; National Key Research and Development Program of China[2016YFA0300601] ; National Key Research and Development Program of China[2017YFA0303304] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB30000000] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2018223]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000521084000003
PublisherAMER PHYSICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/137903
Collection中国科学院金属研究所
Corresponding AuthorRen, Wencai; Kang, Ning
Affiliation1.Peking Univ, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China
2.Peking Univ, Dept Elect, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Hao, Meng,Xu, Chuan,Liu, Zhen,et al. Transport through a network of two-dimensional NbC superconducting crystals connected via weak links[J]. PHYSICAL REVIEW B,2020,101(11):7.
APA Hao, Meng.,Xu, Chuan.,Liu, Zhen.,Wang, Cheng.,Liu, Zhibo.,...&Kang, Ning.(2020).Transport through a network of two-dimensional NbC superconducting crystals connected via weak links.PHYSICAL REVIEW B,101(11),7.
MLA Hao, Meng,et al."Transport through a network of two-dimensional NbC superconducting crystals connected via weak links".PHYSICAL REVIEW B 101.11(2020):7.
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