Extended Data Fig. 1: 3D QHE in different samples and temperature dependence of Hall resistivity.
From: Three-dimensional quantum Hall effect and metal–insulator transition in ZrTe5

a–c, 3D QHE results for ZrTe5 samples 1 (a), 2 (b) and 4 (c) at T = 1.5 K. d, Hall resistivity of sample 2 at different temperatures ranging from 0.6 K to 20 K. Neighbouring curves are shifted by 5 mΩ cm for clarity.