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Transport through a network of two-dimensional NbC superconducting crystals connected via weak links

文献类型：期刊论文

作者Hao, Meng1,2; Xu, Chuan3; Liu, Zhen1,2; Wang, Cheng1,2; Liu, Zhibo3; Sun, Su3; Cheng, Hui-Ming3; Ren, Wencai3; Kang, Ning1,2
刊名PHYSICAL REVIEW B
出版日期2020-03-23
卷号101期号:11页码:7
ISSN号2469-9950
DOI10.1103/PhysRevB.101.115422
通讯作者Ren, Wencai(wcren@imr.ac.cn) ; Kang, Ning(nkang@pku.edu.cn)
英文摘要Recent 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.
资助项目National 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研究方向Materials Science ; Physics
语种英语
WOS记录号WOS:000521084000003
出版者AMER PHYSICAL SOC
资助机构National 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
源URL[http://ir.imr.ac.cn/handle/321006/137902]  
专题金属研究所_中国科学院金属研究所
通讯作者Ren, Wencai; Kang, Ning
作者单位1.Peking Univ, Dept Elect, Beijing 100871, Peoples R China
2.Peking Univ, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式
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.

入库方式： OAI收割

来源：金属研究所

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