Author(s): Yonit Hochberg, Dino Novko, Rotem Ovadia, and Antonio Politano We propose the use of several unconventional materials as detectors for dark matter with mass beneath the MeV scale. These include the transition-metal dichalcogenide ${\mathrm{TiSe}}_{2}$ hosting a low-energy plasmon in the charge-density-wave phase, ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ containing… [Phys. Rev. Lett. 137, 101802] Published Wed Sep 02, 2026