  Dirac materials have been proposed as a new class of electron-based detectors
for light dark-matter (DM) scattering or absorption, with predicted
sensitivities far exceeding superconductors and superfluid helium. The
superiority of Dirac materials originates from a significantly reduced
in-medium dielectric response winning over the suppression of DM scattering
owing to the limited phase space at the point-like Fermi surface. Here we
propose a new route to enhance significantly the DM detection efficiency via
strongly correlated topological semimetals. Specifically, by considering a
strongly correlated Weyl semimetal model system, we demonstrate that the strong
correlation-induced flatband effects can amplify the coupling and detection
sensitivity to light DM particles by expanding the scattering phase space,
while maintaining a weak dielectric in-medium response.
