Strong tilting of a time-modulated superlattice activates Landau-Zener tunneling that equally populates several bands, making the per-cycle drift equal to the average Chern number, yielding fractional drifts such as 1/3 and 1/2.
Two- dimensional magnetotransport in the extreme quantum limit,
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Strongly tilted field induced fractional quantized-drift in non-interacting system
Strong tilting of a time-modulated superlattice activates Landau-Zener tunneling that equally populates several bands, making the per-cycle drift equal to the average Chern number, yielding fractional drifts such as 1/3 and 1/2.