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Twist-angle-dependent quantum phase diagrams in moiré bilayer MoTe(2).
Nature · · Journal Article · Open access
Sun, Xu + more
Abstract ↗AI summary
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Twisted bilayer MoTe2 shows a twist-angle evolution from fractional topological states to valley-degenerate correlated insulators and superconductivity across 3.79°–5.76°.
- Why it matters: Fractional topological phases in twisted bilayer MoTe2 are known at zero magnetic field, but how they change with twist angle and compete with other correlated states is unclear.
- What they did: They performed a systematic transport study of tMoTe2 over twist angles 3.79°–5.76°, tracking phases at moiré hole filling factors including νh = 1/2 and νh = 1.
- The result: Small angles host fractional quantum anomalous Hall states following the Jain sequence and signatures of an anomalous composite Fermi liquid at νh = 1/2, while larger angles suppress these and yield symmetry-breaking integer Chern insulators; above ~5.6°, superconductivity appears next to the νh = 1 correlated insulator.
The findingWhy it mattersWhat they didThe result
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