Distinct superconducting properties and hydrostatic pressure effects in 2D alpha- and beta-Mo2C crystal sheets

doi:10.1038/s41427-020-00242-3

HFCAS OpenIR

	Distinct superconducting properties and hydrostatic pressure effects in 2D alpha- and beta-Mo2C crystal sheets
	Fan, Yunjie 1,2; Xu, Chuan 3; Liu, Xiang 1,2; Ma, Chao 1,2; Yin, Yuewei 1,2; Cheng, Hui-Ming 3,4; Ren, Wencai 3,4; Li, Xiaoguang 1,2,5,6
	2020-09-11
发表期刊	NPG ASIA MATERIALS
ISSN	1884-4049
通讯作者	Yin, Yuewei(yyw@ustc.edu.cn) ; Ren, Wencai(wcren@imr.ac.cn) ; Li, Xiaoguang(lixg@ustc.edu.cn)
摘要	Recently, 2D Mo2C, a new member of the MXene family, has attracted much attention due to the exotic superconducting properties discovered in 2D alpha-Mo2C. Here, not only 2D alpha-Mo2C but also 2D beta-Mo2C crystal sheets with distinct disordered carbon distributions were successfully grown. 2D beta-Mo2C shows a much stronger superconductivity than 2D alpha-Mo2C, and their superconductivities have different hydrostatic pressure responses. The superconducting transition temperatureT(c)of 2D alpha-Mo2C shows a dome-shaped profile under pressure, implying the existence of two competing effects arising from phononic and electronic properties, while for 2D beta-Mo2C,T(c)decreases monotonically with increasing pressure, possibly due to phonon stiffening. These results indicate that the electronic properties have a more important influence on the superconductivity in 2D alpha-Mo2C compared to 2D beta-Mo2C. The ordered and disordered carbon distributions in 2D alpha-Mo2C and beta-Mo2C, respectively, may be the underlying origin for their different electronic and superconducting properties.
DOI	10.1038/s41427-020-00242-3
关键词[WOS]	TRANSITION-METAL CARBIDES ; MO2C ; TEMPERATURE ; DEPENDENCE ; SURFACE ; TC
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51790491] ; National Natural Science Foundation of China[21521001] ; National Natural Science Foundation of China[51972296] ; National Natural Science Foundation of China[51325205] ; National Natural Science Foundation of China[51290273] ; National Natural Science Foundation of China[51802314] ; National Key Research and Development Program of China[2016YFA0300103] ; National Key Research and Development Program of China[2019YFA0307900] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB30000000] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2018223]
项目资助者	National Natural Science Foundation of China ; National Key Research and Development Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000571838900002
出版者	NATURE RESEARCH
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/104164
专题	中国科学院合肥物质科学研究院
通讯作者	Yin, Yuewei; Ren, Wencai; Li, Xiaoguang
作者单位	1.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Dept Phys, Hefei 230026, Peoples R China 2.Univ Sci & Technol China, CAS Key Lab Strongly Coupled Quantum Matter Phys, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 4.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 5.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230026, Peoples R China 6.Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China
推荐引用方式 GB/T 7714	Fan, Yunjie,Xu, Chuan,Liu, Xiang,et al. Distinct superconducting properties and hydrostatic pressure effects in 2D alpha- and beta-Mo2C crystal sheets[J]. NPG ASIA MATERIALS,2020,12.
APA	Fan, Yunjie.,Xu, Chuan.,Liu, Xiang.,Ma, Chao.,Yin, Yuewei.,...&Li, Xiaoguang.(2020).Distinct superconducting properties and hydrostatic pressure effects in 2D alpha- and beta-Mo2C crystal sheets.NPG ASIA MATERIALS,12.
MLA	Fan, Yunjie,et al."Distinct superconducting properties and hydrostatic pressure effects in 2D alpha- and beta-Mo2C crystal sheets".NPG ASIA MATERIALS 12(2020).