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Surface passivation induced a significant enhancement of superconductivity in layered two-dimensional MSi2N4 (M = Ta and Nb) materials
Yan, Luo1,2; Wang, Bao-Tian3,4; Huang, Xingyong1; Li, Qiaoqiao1,2; Xue, Kui1,2; Zhang, Jing1,2; Ren, Wencai5,6; Zhou, Liujiang1,2
Corresponding AuthorZhou, Liujiang(ljzhou86@uestc.edu.cn)
2021-11-25
Source PublicationNANOSCALE
ISSN2040-3364
Volume13Issue:45Pages:18947-18954
AbstractTwo-dimensional (2D) transition metal di-nitrides (TMN2) have been arousing great interest for their unique mechanic, electronic, optoelectronic, and magnetic properties. The recent successful growth of monolayer MSi2N4 (M = Mo and W) further motivates us to explore new physics and unusual properties behind this family. By using first-principles calculations and Bardeen-Cooper-Schrieffer theory, we predicted the existence of the superconductivity in single-layer (SL) 1T- and 1H-TaN2 with superconducting transition temperatures (T-c) of similar to 0.86 and 1.3 K. Specifically, the T-c could be greatly enhanced to similar to 24.6 K by passivating the TaN2 monolayer with Si-N bilayers. Furthermore, the superconductivity could be increased to similar to 30.4 K via substituting lighter Nb for Ta. This enhancement of superconductivity mainly stems from the softer vibration modes consisting of in-plane Ta/Nb vibrations mixed with Si-xy vibrations. The superconductivity can be further tuned by applying external strains and carrier doping. This enhancement strategy of surface passivation and light atom substitution would suggest a new platform for 2D superconductors and provide an instructive pathway for next-generation nanoelectronics.
Funding OrganizationUniversity of Electronic Science and Technology of China ; Natural Science Foundation of China
DOI10.1039/d1nr05560g
Indexed BySCI
Language英语
Funding ProjectUniversity of Electronic Science and Technology of China ; Natural Science Foundation of China[11675195] ; Natural Science Foundation of China[12074381]
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000716601400001
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/167197
Collection中国科学院金属研究所
Corresponding AuthorZhou, Liujiang
Affiliation1.Univ Elect Sci & Technol China, Sch Phys, Chengdu 610054, Peoples R China
2.Univ Elect Sci & Technol China, Yangtze Delta Reg Inst Huzhou, Huzhou 313001, Peoples R China
3.Chinese Acad Sci, Inst High Energy Phys, Beijing 10049, Peoples R China
4.Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China
5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
6.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Yan, Luo,Wang, Bao-Tian,Huang, Xingyong,et al. Surface passivation induced a significant enhancement of superconductivity in layered two-dimensional MSi2N4 (M = Ta and Nb) materials[J]. NANOSCALE,2021,13(45):18947-18954.
APA Yan, Luo.,Wang, Bao-Tian.,Huang, Xingyong.,Li, Qiaoqiao.,Xue, Kui.,...&Zhou, Liujiang.(2021).Surface passivation induced a significant enhancement of superconductivity in layered two-dimensional MSi2N4 (M = Ta and Nb) materials.NANOSCALE,13(45),18947-18954.
MLA Yan, Luo,et al."Surface passivation induced a significant enhancement of superconductivity in layered two-dimensional MSi2N4 (M = Ta and Nb) materials".NANOSCALE 13.45(2021):18947-18954.
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