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Fractional quantum Hall effect at zero magnetic field observed in an unexpected material

The fractional quantum anomalous Hall effect occurs when the Hall resistance in a material is quantized to fractional multiples of the fundamental unit h/e2 at zero magnetic field. Observing the effect in a system consisting of a combination of five-layer graphene and hexagonal boron nitride enriches the family of topological matter phases, and opens up new opportunities in quantum computation.

This is a summary of: Lu, Z. et al. Fractional quantum anomalous Hall effect in multilayer graphene. Nature 626, 759–764 (2024).

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doi: https://doi.org/10.1038/d41586-024-00067-y

‘Expert opinion’ is published under a CC BY 4.0 licence.

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