Realizing ferromagnetic semiconductors with room Curie temperature TC remains a challenge in spintronics. Inspired by the recent experimental progress on the nanotubes based on 2D van der Waals non-magnetic transition-metal dichalcogenides, magnetic nanotubes based on monolayer ferromagnetic materials are highly possible. Here, we proposed a way how to obtain high TC ferromagnetic semiconductor nanotubes. Some high TC ferromagnetic semiconductors are predicted in the MX2 nanotubes (M = V, Cr, Mn, Fe, Co, Ni; X = S, Se, Te), including CrS2 and CrTe2 zigzag nanotubes with the diameter of 18 unit cells showing TC above 300 K. In addition, due to the strain gradient in walls of nanotubes, an electrical polarization at level of 0.1 eV/\AA~inward of the radial direction is obtained. Our results not only present novel ferromagnetic semiconductor nanotubes with room Curie temperature but also be indicative of how to obtain such nanotubes based on experimentally obtained 2D high TC ferromagnetic metals.
@article{arxiv.2501.13287,
title = {Ferromagnetic Semiconductor Nanotubes with Room Curie Temperatures},
author = {Jia Wen Li and Gang Su and Bo Gu},
journal= {arXiv preprint arXiv:2501.13287},
year = {2025}
}