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Research Highlight

Gapless topological surface states are explained by stacking-fault disorder


A gapless surface state with non-trivial topological properties is shown to result solely from stacking-fault disorder at the MnBi2Te4 (MBT) surface.

Our findings provide a new explanation to the long-standing puzzle of how to reconcile contradictory surface gap measurements in various MBT samples.

DOI: 10.1021/acs.jpclett.3c01939