Moiré transition metal dichalcogenide (TMD) materials provide an ideal playground for studying the combined interplay of strong interactions and band-topology over a range of electronic fillings. Here we investigate the panoply of interaction-induced electronic phases that arise at a total commensurate filling of ${\nu }_T=2$ in moiré TMD heterobilayers, focusing specifically on their renormalized band-topology. We carry out a comprehensive self-consistent parton mean-field analysis on an interacting mixed-valence Hamiltonian describing AB-stacked ${\mathrm{MoTe}}_2$/${\mathrm{WSe}}_2$ to highlight different ingredients that arise due to “Mottness,” band-flattening, an enhanced excitonic tendency, and band inversion, leading to correlated topological semi-metals and insulators. We also propose a possible route towards realizing fractionalized insulators with emergent neutral fermionic excitations in this and other closely related platforms.

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• Excitons
• Spinon
• Topological insulators
• Kondo insulators
• Strongly correlated systems
• Two-dimensional electron system
• Slave bosons