In high-topological-number skyrmion crystals, each electronic band contributes on average 1/Q of the conductance quantum e2/h to the quantized Hall conductivity, so Q=2 and Q=3 textures give fractional steps.
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Unconventional topological Hall effect in high-topological-number skyrmion crystals
In high-topological-number skyrmion crystals, each electronic band contributes on average 1/Q of the conductance quantum e2/h to the quantized Hall conductivity, so Q=2 and Q=3 textures give fractional steps.