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Superconductivity of the two-dimensional MB2C2 (M = 3d, 4d) monolayers

文献类型：期刊论文

作者Wu, Shan-Shan3; Yang, Chuan-Lu2,3; Li, Xiaohu2,4; Liu, Yuliang3; Zhao, Wenkai3; Gao, Feng1
刊名MATERIALS TODAY COMMUNICATIONS
出版日期2025
卷号42页码:111207
关键词Superconducting transition temperature Two-dimensional superconductor Migdal-Eliashberg equation Superconducting gap Electron-phonon coupling
DOI10.1016/j.mtcomm.2024.111207
产权排序2
英文摘要CrB2C2, MoB2C2, and YB2C2 monolayers with superconducting properties are screened from a set of 20 MB2C2 (M = 3d, 4d) monolayers by evaluating their energy, dynamical, and thermodynamical stabilities, alongside solving the anisotropic Migdal-Eliashberg equation. Negative cohesive energies are exhibited by all the examined monolayers; however, only 10 are found to possess no imaginary frequencies in the first Brillouin zone, indicating dynamical stability. Among these, CrB2C2, MoB2C2, and YB2C2 monolayers are identified as having the highest superconducting transition temperatures, as derived from solving the isotropic McMillan equation. Further analysis using the anisotropic Migdal-Eliashberg equation provides more accurate transition temperatures of 25.5 K, 16.2 K, and 18.1 K, respectively. A single superconducting gap is revealed in CrB2C2 and MoB2C2 by Fermi surface analysis, while YB2C2 is found to exhibit two distinct superconducting gaps. The CrB2C2 monolayer with a large density of states and apparent Van Hove singularities near Fermi level, is recognized as a most promising candidate for superconducting materials among the MB2C2 monolayers, thus expanding the family of two-dimensional superconductors based on boron-carbon monolayers.
WOS关键词TRANSITION-TEMPERATURE ; LI
资助项目National Natural Science Foundation of China[12374232]
WOS研究方向Materials Science
语种英语
WOS记录号WOS:001377390700001
出版者ELSEVIER
资助机构National Natural Science Foundation of China
源URL[http://ir.xao.ac.cn/handle/45760611-7/7281]  
专题天体化学研究团组
通讯作者Yang, Chuan-Lu
作者单位1.Southern Univ & A&M Coll, Dept Phys, Baton Rouge, LA 70813 USA
2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
3.Ludong Univ, Sch Phys & Optoelect Engn, Yantai 264025, Peoples R China
4.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Shan-Shan,Yang, Chuan-Lu,Li, Xiaohu,et al. Superconductivity of the two-dimensional MB2C2 (M = 3d, 4d) monolayers[J]. MATERIALS TODAY COMMUNICATIONS,2025,42:111207.
APA Wu, Shan-Shan,Yang, Chuan-Lu,Li, Xiaohu,Liu, Yuliang,Zhao, Wenkai,&Gao, Feng.(2025).Superconductivity of the two-dimensional MB2C2 (M = 3d, 4d) monolayers.MATERIALS TODAY COMMUNICATIONS,42,111207.
MLA Wu, Shan-Shan,et al."Superconductivity of the two-dimensional MB2C2 (M = 3d, 4d) monolayers".MATERIALS TODAY COMMUNICATIONS 42(2025):111207.

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来源：新疆天文台

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