Ferromagnetic Semiconducting VI3 Single-Chain Nanowire

One-dimensional ferromagnetic semiconductor is important for fundamental research and nanoscale spintronic applications. In this article, we systematically studied the vanadium-trihalide VX3 (X= F, Cl, Br, I) nanowires. Among the VX3 nanowires, we found that a finite-length single-chain VI3 nanowire is a ferromagnetic semiconductor with a blocking temperature of around 64 K using Monte Carlo simulations. In addition, we constructed a 2D nanowire array and found that the interchain exchange interactions of VI3 nanowires favor ferromagnetic states. The VI3 nanowire array has a Curie temperature of around 113 K, which is higher than the liquidus temperature of nitrogen. Moreover, the ferromagnetic VI3 nanowire keeps stable during deformation and doping. The intrinsic semiconductivity found in ferromagnetic VI3 nanowire allows it to have significant applications in nanoscale spintronic.