We study quantum transport in disordered topological insulator nanowires (TINWs) under axial magnetic flux. At integer flux quanta, spin-momentum locking produces weak anti-localization peaks, while at half-integer flux quanta a helical mode protected by time-reversal symmetry (TRS) suppresses backscattering. By analyzing the flux dependence of the localization length, we uncover critical scaling around half-integer flux quanta, reflecting the competition between disorder scattering and flux-induced breaking of TRS protection. As the disorder strength increases, we identify a crossover in scaling behavior that drives the system into a regime governed by a universal critical exponent. Our results demonstrate a scaling collapse across flux values, establishing a universal regime of flux-driven delocalization in TINWs.
@article{arxiv.2602.20884,
title = {Flux-Driven Conductance Scaling in Disordered Topological Insulator Nanowires},
author = {Shimon Arie Haver and Emuna Rimon and Eytan Grosfeld},
journal= {arXiv preprint arXiv:2602.20884},
year = {2026}
}