| Distinct superconducting properties and hydrostatic pressure effects in 2D α- and β -Mo 2 C crystal sheets | |
| Yunjie Fan1; Chuan Xu2; Xiang Liu1; Chao Ma1; Yuewei Yin1; Hui-Ming Cheng2; Wencai Ren2; Xiaoguang Li1 | |
| 2020-01-01 | |
| Source Publication | NPG Asia Materials
 |
| ISSN | 1884-4049 |
| Volume | 12Issue:1 |
| Abstract | Recently, 2D Mo 2 C, a new member of the MXene family, has attracted much attention due to the exotic superconducting properties discovered in 2D α -Mo 2 C. Here, not only 2D α -Mo 2 C but also 2D β -Mo 2 C crystal sheets with distinct disordered carbon distributions were successfully grown. 2D β -Mo 2 C shows a much stronger superconductivity than 2D α -Mo 2 C, and their superconductivities have different hydrostatic pressure responses. The superconducting transition temperature T c of 2D α -Mo 2 C shows a dome-shaped profile under pressure, implying the existence of two competing effects arising from phononic and electronic properties, while for 2D β -Mo 2 C, 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 α -Mo 2 C compared to 2D β -Mo 2 C. The ordered and disordered carbon distributions in 2D α -Mo 2 C and β -Mo 2 C, respectively, may be the underlying origin for their different electronic and superconducting properties. |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/159501 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.中国科学技术大学 2.Institute of Metal Research, Chinese Academy of Sciences 3.中国科学院固体物理研究所 4.Collaborative Innovation Center of Advanced Microstructures |
| Recommended Citation GB/T 7714 | Yunjie Fan,Chuan Xu,Xiang Liu,et al. Distinct superconducting properties and hydrostatic pressure effects in 2D α- and β -Mo 2 C crystal sheets[J]. NPG Asia Materials,2020,12(1). |
| APA | Yunjie Fan.,Chuan Xu.,Xiang Liu.,Chao Ma.,Yuewei Yin.,...&Xiaoguang Li.(2020).Distinct superconducting properties and hydrostatic pressure effects in 2D α- and β -Mo 2 C crystal sheets.NPG Asia Materials,12(1). |
| MLA | Yunjie Fan,et al."Distinct superconducting properties and hydrostatic pressure effects in 2D α- and β -Mo 2 C crystal sheets".NPG Asia Materials 12.1(2020). |
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