Science Advances

This PDF file includes:

• section S1. Sample.
• section S2. Jumps in negative field.
• section S3. Tunneling out of metastable state.
• section S4. One-wall model.
• section S5. Multiple domains and the network model.
• fig. S1. Photo of the Hall bar used in the experiment.
• fig. S2. Curves of R_yx versus H for the transition between Chern states induced by sweeping H to negative values (arrow), with V_g fixed at −80 V.
• fig. S3. Field profiles of R_xx as H is decreased through −H_c at temperatures 10 to 83 mK (A) and 83 to 152 mK (B).
• fig. S4. The effect of increasing T on the curves of R_yx (A) and R_xx (B), with V_g fixed at −120 V (upper edge of the optimal gating window).
• fig. S5. Sketch of the device with a domain wall bisecting the film.

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