所属单位：航空学院
发表刊物：J. Mater. Chem. C
摘要：Simultaneous control of charge and spin of electrons within a two-dimensional (2D) space is ideal for nanoscale spintronic applications, but a 2D material with both intrinsic magnetism and semiconducting nature has been rare. Here, we report a first-principles design of a semiconducting tetragonal NbSeH2 monolayer with ferromagnetic order. The monolayer is made up of metal-ligand bonds on one-surface and hydrogen bridge bonds on the other surface, which forms a built-in electric polarization that opens a bandgap of 0.94 eV in an otherwise metallic system. As such, charge doping via an applied gate voltage not only enhances ferromagnetic coupling between local moments but also turns the monolayer into a half-metal that enables completely spin-polarized current. Monte Carlo simulations estimate a Curie temperature of 101 K at a hole-carrier density of 4.70 × 1013 cm−2. Moreover, the monolayer shows high thermal and dynamic stability and can be extended to a large group of transition metals and chalcogens, pointing to a new ‘family' of Janus 2D materials for versatile applications. © The Royal Society of Chemistry.
ISSN号：2050-7534
是否译文：否
发表时间：2018-01-01
合写作者：Zhou, Xiaocheng,Sun, Xu,郭万林
通讯作者：张助华
发表时间：2018-01-01