In twisted MoTe2, a uniform Chern-Simons flux approximation predicts Jain-sequence fractional Chern insulators plus higher-Chern 'fractal' fractional Chern insulators, with electric fields able to close gaps and trigger topological transitions.
For the other fractal FCI states, the gaps are smaller and each filled composite band car- ries a higher Chern number C = 2 or C = 3
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Electromagnetic response and emergent topological orders in transition metal dichalcogenide MoTe$_2$ bilayers
In twisted MoTe2, a uniform Chern-Simons flux approximation predicts Jain-sequence fractional Chern insulators plus higher-Chern 'fractal' fractional Chern insulators, with electric fields able to close gaps and trigger topological transitions.