Magnetotransport Properties in High-Quality Ultrathin Two-Dimensional   Superconducting Mo2C Crystals

doi:10.1021/acsnano.6b00270

CORC > 北京大学 > 信息科学技术学院

	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
刊名	ACS NANO
	2016
关键词	transition metal carbides two-dimensional superconductivity magnetotransport properties QUANTUM PHASE-TRANSITIONS INSULATOR TRANSITION NEGATIVE MAGNETORESISTANCE DIRTY SUPERCONDUCTORS MAGNETIC-FIELD GROUND-STATE THIN-FILMS OSCILLATIONS TEMPERATURE LIMIT
DOI	10.1021/acsnano.6b00270
英文摘要	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.; National Natural Science Foundation of China [11374019, 51325205, 51290273, 51521091, 51172240]; Chinese Academy of Sciences [KGZD-EW-303-1]; SCI(E); EI; PubMed; ARTICLE; wcren@imr.ac.cn; nkang@pku.edu.cn; 4; 4504-4510; 10
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/434169]
专题	信息科学技术学院
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.
APA	Wang, Libin.,Xu, Chuan.,Liu, Zhibo.,Chen, Long.,Ma, Xiuliang.,...&Kang, Ning.(2016).Magnetotransport Properties in High-Quality Ultrathin Two-Dimensional Superconducting Mo2C Crystals.ACS NANO.
MLA	Wang, Libin,et al."Magnetotransport Properties in High-Quality Ultrathin Two-Dimensional Superconducting Mo2C Crystals".ACS NANO (2016).