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arXiv · 2305.19967

Dark Matter Detection with Strongly Correlated Topological Materials: Flatband Effect

Zhao Huang·Christopher Lane·Sarah E. Grefe·Snehasish Nandy·Benedikt Fauseweh·Silke Paschen·Qimiao Si·Jian-Xin Zhu
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Abstract

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.

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Zhao Huang, Christopher Lane, Sarah E. Grefe, Snehasish Nandy, Benedikt Fauseweh, Silke Paschen, Qimiao Si, Jian-Xin Zhu. 2023-05-31. Dark Matter Detection with Strongly Correlated Topological Materials: Flatband Effect. https://arxiv.org/abs/2305.19967

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