Magnetic origin of phase stability in cubic gamma-MoN | |
Zheng X; Wang HL; Yu XH; Feng JS; Shen X; Zhang SJ; Yang R(杨荣)![]() ![]() | |
Source Publication | APPLIED PHYSICS LETTERS
![]() |
2018-11-26 | |
Volume | 113Issue:22Pages:Ar-221901 |
ISSN | 0003-6951 |
Abstract | Among transition-metal nitrides, the mononitride gamma-MoN with a rock-salt structure has drawn particular attention because it has been predicted to possess excellent mechanical and electronic properties, especially the high superconducting temperature around 30 K. However, synthesis of bulk gamma-MoNx with the nitrogen concentration, x, more than 0.5 is still challenging, leading to contradictions on its phase stability and properties. In this work, we formulated a high-pressure synthesis reaction for the formation of single-crystal gamma-MoNx with a remarkably high nitrogen concentration value of x approximate to 0.67. This nitride possesses a high asymptotic hardness of similar to 24 GPa, which is so far the second hardest among metal nitrides. Impressively, the expected superconductivity is absent in the as-synthesized product. We further performed density functional theory calculations to clarify the structural stability and the absence of superconductivity in stoichiometric gamma-MoN. We find that the ground state of gamma-MoN is theoretically explored to be a Mott insulator with an antiferromagnetic phase, while a paramagnetic configuration is adopted at the ambient conditions. Such magnetic properties would explain the structural stability and the absence of superconductivity in the as-synthesized gamma-MoNx with a high nitrogen concentration. Published by AIP Publishing. |
DOI | 10.1063/1.5048540 |
URL | 查看原文 |
Indexed By | SCI ; EI |
Language | 英语 |
WOS ID | WOS:000451739700014 |
WOS Keyword | HIGH-PRESSURE SYNTHESIS ; CRYSTAL-STRUCTURE ; PHONON-SPECTRA ; HARDNESS ; FILMS ; SUPERCONDUCTIVITY ; TRANSITION ; NITRIDE ; INSTABILITIES ; CATALYST |
WOS Research Area | Physics, Applied |
WOS Subject | Physics |
Funding Organization | National Key R&D Program of China [2016YFA0401503] ; National Science Foundation of China [11575288, 51471018, 21773005, 51402350] ; Shenzhen Peacock Plan [KQTD2016053019134356] ; Guangdong Innova-tive & Entrepreneurial Research Team Program [2016ZT06C279] ; Shenzhen Development and Reform Commission Foundation for Novel Nano-Material Sciences ; BUCT Fund for Disciplines Construction [XK1702] |
Classification | 二类/Q1 |
Ranking | 5+ |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://dspace.imech.ac.cn/handle/311007/78127 |
Collection | 非线性力学国家重点实验室 |
Affiliation | 1.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 4.Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China 5.Nankai Univ, Dept Phys, Tianjin 300072, Peoples R China 6.Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China 7.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 8.Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Hubei, Peoples R China 9.Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China 10.Beijing Computat Sci Res Ctr, Beijing 100193, Peoples R China 11.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China |
Recommended Citation GB/T 7714 | Zheng X,Wang HL,Yu XH,et al. Magnetic origin of phase stability in cubic gamma-MoN[J]. APPLIED PHYSICS LETTERS,2018,113(22):Ar-221901. |
APA | Zheng X.,Wang HL.,Yu XH.,Feng JS.,Shen X.,...&Wang SM.(2018).Magnetic origin of phase stability in cubic gamma-MoN.APPLIED PHYSICS LETTERS,113(22),Ar-221901. |
MLA | Zheng X,et al."Magnetic origin of phase stability in cubic gamma-MoN".APPLIED PHYSICS LETTERS 113.22(2018):Ar-221901. |
Files in This Item: | Download All | |||||
File Name/Size | DocType | Version | Access | License | ||
irJ2018055.pdf(1025KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
IrJ2018349.pdf(1501KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment