2025/10/22 by Xin Chen, Chen, Xin, Zhen Han +5
Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.2510.19700
arxiv created 2026/08/02 · arxiv updated 2026/08/04
Altermagnetism has been widely explored in 3D and 2D crystals, but its one-dimensional realization remains largely unexplored. Here we propose an altermagnetic nanotube formed by rolling a 2D altermagnet, which converts \textcolorblacksymmetry-enforced directional spin anisotropy in momentum space into \textcolorblackspin--chirality locking in the screw-symmetric geometry. Unlike curvature-induced magnetization in bent films, \textcolorblackthe nanotube remains compensated and produces no net magnetization. Two reciprocal effects emerge: (i) \textcolorblackspin-selective injection drives a helical current whose handedness is fixed by the spin, yielding opposite-sign axial magnetic fields; and (ii) a time-varying axial flux generates a circumferential Faraday field that drives \textcolorblackequal and opposite axial charge currents in the two fixed spin channels, yielding a charge-neutral spin-channel current in the open-circuit weak-SOC limit. \textcolorblackExplicit the first-principles calculations of the relaxed V2Se2O nanotube reveal spin-resolved helical |ψ|2 modulations near both band edges, while a parent-monolayer Wannier--Boltzmann calculation quantifies the energy-dependent spin-odd transverse response and corresponding ideal thin-wall field scale.