Tunable Topology and Correlated States in Twisted Homobilayer Transition Metal Dichalcogenides
by
WHGA/121
We create honeycomb superlattice structures inTMD moiré materials as model systems to study magnetism, electronic correlations and topology. In twisted MoTe2, we realize topological flat bands that closely resemble the lowest Landau level but in the absence of an external magnetic field. We present evidence for integer and fractional Chern states [1], which are the lattice analogues of integer and fractional quantum Hall states at zero magnetic field. We further explore correlatedstates in twisted WSe2 and demonstrate their tunability with twist angle, electric and magnetic fields [2]. By relating these findings to the continuum model valence band structure, we provide an understanding for our observations and offer guidance for designing homobilayer moiré materials.
Laboratory for Theoretical and Computational Physics