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Magnetotransport Properties in High-Quality Ultrathin Two-Dimensional Superconducting Mo2C Crystals
Wang, Libin; Xu, Chuan; Liu, Zhibo; Chen, Long; Ma, Xiuliang; Cheng, Hui-Ming; Ren, Wencai; Kang, Ning; Kang, N (reprint author), Peking Univ, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China.; Kang, N (reprint author), Peking Univ, Dept Elect, Beijing 100871, Peoples R China.; Ren, WC (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China.
2016-04-01
发表期刊ACS NANO
ISSN1936-0851
卷号10期号:4页码:4504-4510
摘要Ultrathin transition metal carbides are a class of developing two-dimensional (2D) materials with superconductivity and show great potentials for electrical energy storage and other applications. Here, we report low temperature magnetotransport measurements on high quality ultrathin 2D superconducting alpha-Mo2C crystals synthesized by a chemical vapor deposition method. The magnetoresistance curves exhibit reproducible oscillations at low magnetic fields for temperature far below the superconducting transition temperature of the crystals. We interpret the oscillatory magnetoresistance as a consequence of screening currents circling around the boundary of triangle-shaped terraces found on the surface of ultrathin Mo2C crystals. As the sample thickness decreases, the Mo2C crystals exhibit negative magnetoresistance deep in the superconducting transition regime, which reveals strong phase fluctuations of the superconducting order parameters associated with the superconductor insulator transition. Our results demonstrate that the ultrathin superconducting Mo2C crystals provide an interesting system for studying rich transport phenomena in a 2D crystalline superconductor with enhanced quantum fluctuations.
部门归属[wang, libin ; kang, ning] peking univ, key lab phys & chem nanodevices, beijing 100871, peoples r china ; [wang, libin ; kang, ning] peking univ, dept elect, beijing 100871, peoples r china ; [xu, chuan ; liu, zhibo ; chen, long ; ma, xiuliang ; cheng, hui-ming ; ren, wencai] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china
关键词Transition Metal Carbides Two-dimensional Superconductivity Magnetotransport Properties
学科领域Chemistry ; Science & Technology - Other Topics ; Materials Science
资助者National Natural Science Foundation of China [11374019, 51325205, 51290273, 51521091, 51172240]; Chinese Academy of Sciences [KGZD-EW-303-1]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75918
专题中国科学院金属研究所
通讯作者Kang, N (reprint author), Peking Univ, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China.; Kang, N (reprint author), Peking Univ, Dept Elect, Beijing 100871, Peoples R China.; Ren, WC (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Wang, Libin,Xu, Chuan,Liu, Zhibo,et al. Magnetotransport Properties in High-Quality Ultrathin Two-Dimensional Superconducting Mo2C Crystals[J]. ACS NANO,2016,10(4):4504-4510.
APA Wang, Libin.,Xu, Chuan.,Liu, Zhibo.,Chen, Long.,Ma, Xiuliang.,...&Ren, WC .(2016).Magnetotransport Properties in High-Quality Ultrathin Two-Dimensional Superconducting Mo2C Crystals.ACS NANO,10(4),4504-4510.
MLA Wang, Libin,et al."Magnetotransport Properties in High-Quality Ultrathin Two-Dimensional Superconducting Mo2C Crystals".ACS NANO 10.4(2016):4504-4510.
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