High-temperature ferromagnetic semiconductors: Janus monolayer vanadium trihalides

• DOI: 10.1103/physrevb.101.134421
• Publication Date: 2020-04-17T15:32:12Z
• Authors: Yulu Ren; Qiaoqiao Li; Wenhui Wan; Yong Liu; Yanfeng Ge
• Keywords: Condensed Matter - Materials Science; Materials Science (cond-mat.mtrl-sci); FOS: Physical sciences; 02 engineering and technology; 0210 nano-technology; 01 natural sciences; 0104 chemical sciences

Two-dimensional intrinsic ferromagnetic semiconductors are expected to stand out in the spintronic field. Recently, monolayer ${\mathrm{VI}}_{3}$ was experimentally synthesized, but weak ferromagnetism and low Curie temperature ${T}_{C}$ limit its potential application. Here we report that Janus structure can elevate 240 K. And discuss reason for high structure, which is lower virtual exchange gap between ${t}_{2g}$ ${e}_{g}$ states of nearest-neighbor V atoms. In addition, be further substantially enhanced by tensile strain due increasing driven rapidly quenched direct interaction. Our work supports a feasible approach enhance unveils stable FM realistic applications spintronics.