title: Atomically Thin Transition-Metal Dinitrides: High-Temperature Ferromagnetism and Half-Metallicity.
abstract: High-temperature ferromagnetic two-dimensional (2D) materials with flat surfaces have been a long-sought goal due to their potential in spintronics applications. Through comprehensive first-principles calculations, we show that the recently synthesized MoN2 monolayer is such a material; it is ferromagnetic with a Curie temperature of nearly 420 K, which is higher than that of any flat 2D magnetic materials studied to date. This novel property, made possible by the electron-deficient nitrogen ions, render transition-metal dinitrides monolayers with unique electronic properties which can be switched from the ferromagnetic metals in MoN2, ZrN2, and TcN2 to half-metallic ones in YN2. Transition-metal dinitrides monolayers may, therefore, serve as good candidates for spintronics devices.
authors.affiliation: School of Science, Nanjing Forestry University , Nanjing, Jiangsu 210037, P. R. China.|Department of Applied Physics and Key Laboratory of Soft Chemistry and Functional Materials (Ministry of Education), Nanjing University of Science and Technology , Nanjing, Jiangsu 210094, P. R. China.
authors.forename: Fang
authors.initials: F
authors.lastname: Wu
authors.affiliation: Department of Applied Physics and Key Laboratory of Soft Chemistry and Functional Materials (Ministry of Education), Nanjing University of Science and Technology , Nanjing, Jiangsu 210094, P. R. China.
authors.forename: Chengxi
authors.initials: C
authors.lastname: Huang
authors.affiliation: Department of Applied Physics and Key Laboratory of Soft Chemistry and Functional Materials (Ministry of Education), Nanjing University of Science and Technology , Nanjing, Jiangsu 210094, P. R. China.
authors.forename: Haiping
authors.initials: H
authors.lastname: Wu
authors.affiliation: Department of Chemistry, Pohang University of Science and Technology , San31 Hyoia-dong, Namgu, Pohang, Kyungbuk 790-784, South Korea.
authors.forename: Changhoon
authors.initials: C
authors.lastname: Lee
authors.affiliation: Department of Applied Physics and Key Laboratory of Soft Chemistry and Functional Materials (Ministry of Education), Nanjing University of Science and Technology , Nanjing, Jiangsu 210094, P. R. China.
authors.forename: Kaiming
authors.initials: K
authors.lastname: Deng
authors.affiliation: Department of Applied Physics and Key Laboratory of Soft Chemistry and Functional Materials (Ministry of Education), Nanjing University of Science and Technology , Nanjing, Jiangsu 210094, P. R. China.
authors.forename: Erjun
authors.initials: E
authors.lastname: Kan
authors.affiliation: Department of Physics, Virginia Commonwealth University , Richmond, Virginia 23284, United States.
authors.forename: Puru
authors.initials: P
authors.lastname: Jena
keywords: ferromagnetism; first-principles calculations; half-metal; transition-metal dinitrides; two-dimensional materials