Fig. 4 Behavior of resistance peak near density nm = 5. Behavior of resistance peak near density nm = 5. (A) Temperature dependence of the resistance peak. (B) Arrhenius plot of resistance showing a gap of ~0.1 meV. Emilio Codecido et al. Sci Adv 2019;5:eaaw9770 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).