We study the electronic properties of multilayer "spirals" of two-dimensional materials with continuously increasing twist angle. The electronic states are shown to undergo a universal 3D-to-2D transition on increasing the in-plane momentum k∥ away from the Γ point. The states with k∥>kc are localized along the z axis due to mismatch between electronic dispersions of the twisted layers, whereas those with k∥<kc are extended. We support our results by mapping of the system on the Aubry-Andr\'e model and deduce the experimental signatures of 3D to 2D localization in transport experiments.
@article{arxiv.2603.12329,
title = {3D to 2D localization in supertwisted multilayers},
author = {Jeane Siriviboon and Pavel Volkov},
journal= {arXiv preprint arXiv:2603.12329},
year = {2026}
}