Extended Data Fig. 1: Reproducibility of ferromagnetism at ν = -3 in devices with different twist angles. | Nature Physics

Extended Data Fig. 1: Reproducibility of ferromagnetism at ν = -3 in devices with different twist angles.

From: Ferromagnetism and topology of the higher flat band in a fractional Chern insulator

Extended Data Fig. 1: Reproducibility of ferromagnetism at ν = -3 in devices with different twist angles.The alternative text for this image may have been generated using AI.

a-f, Reflective magnetic circular dichroism (RMCD) signal as a function of carrier density (n, bottom axis) or filling factor (ν, top axis) and displacement field (D/ε0). Twist angles are indicated on top of each panel. All data were taken at zero magnetic field at a temperature of 1.6 K. Magnetic fluctuations are visible at ν = -1 and -3, which can be stabilized with a small out of plane field as seen in Fig. 1b in the main text.

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