The discovery of fractional Chern insulators (FCIs) unlocks exciting opportunities to explore emergent physical excitations arising from topological and geometric effects in novel phases of quantum matter. Here, we investigate the intraband neutral excitations, namely magnetorotons, in moiré FCIs within twisted ${\mathrm{MoTe}}_2$ by applying the generalized Girvin, MacDonald, and Platzman ansatz. Furthermore, we explore the quadrupole nature of magnetorotons in the long-wavelength limit and underscore the breakdown of volume-preserving symmetry due to the band fluctuations. Especially, we find that the band fluctuations brought by the lattice effects induce exotic behavior of magnetorotons in moiré FCI. Finally, we provide experimental proposals for detecting and advancing the study of intraband neutral excitations in moiré FCIs.

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• Flat bands
• Quasiparticles & collective excitations
• Strong interaction
• Topological materials
• Transition metal dichalcogenides
• Exact diagonalization