Fig. 1: Incompressible states with fractional quantum numbers in MATBG.
From: Fractional Chern insulators in magic-angle twisted bilayer graphene
a, Local inverse compressibility dµ/dn measured as a function of magnetic field B and electrons per moiré unit cell ν. b, Wannier diagram identifying the incompressible peaks present in a. Black lines correspond to ChIs and integer quantum Hall (IQH) states; green lines correspond to correlated insulators (CIs) emanating with nonzero integer s and t = 0; blue lines correspond to CDWs with integer t = 0 and fractional s; yellow lines correspond to SBCIs with nonzero integer t and fractional s; and orange lines correspond to FCIs with fractional t and fractional s. Grey shaded regions correspond to the gaps to the remote bands.
