杰纳斯
铁磁性
凝聚态物理
材料科学
密度泛函理论
金属丰度
过渡金属
磁性
磁矩
金属-绝缘体过渡
磁化
之字形的
费米能级
态密度
半金属
磁性半导体
金属
反铁磁性
异质结
兴奋剂
纳米技术
物理
化学
冶金
量子力学
生物化学
催化作用
银河系
标识
DOI:10.1016/j.commatsci.2018.05.049
摘要
Abstract Searching experimental feasible two-dimensional (2D) ferromagnetic crystals with room-temperature magnetic order and high spin-polarization is one key for the development of next-generation spintronic devices. Inspired by the recent experimental achievement for the synthesis of Janus MoSSe monolayer with out-of-plane symmetry, here, by ab initio calculation, we demonstrate this feasibility with the discovery of intrinsic 2D ferromagnetic Janus TMDs monolayer (TMXX′, TM = V, Cr and Mn; X, X′ = S, Se and Te, X ≠ X′) with large spin-polarization and high Curie temperature. Particularly, the MnSSe monolayer show half-metal with 100% spin polarization and wide half-metallic gap. A Curie temperature as high as 400 K has been found for VSSe materials. The formation energy calculation for Janus TMDs can be comparable with the TMDs monolayer. The dynamical stability for these 2D crystals also have been confirmed by phonon spectrum calculation. Our study presents a new class of 2D magnetic materials for future spintronics and valleytronics.
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