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SiC Detectors for Sub-GeV Dark Matter
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We propose the use of silicon carbide (SiC) for direct detection of sub-GeV dark matter. SiC has properties similar to both silicon and diamond, but has two key advantages: (i) it is a polar semiconductor which allows sensitivity to a broader range of dark matter candidates; and (ii) it exists in many stable polymorphs with varying physical properties, and hence has tunable sensitivity to various dark matter models. We show that SiC is an excellent target to search for electron, nuclear and phonon excitations from scattering of dark matter down to 10 keV in mass, as well as for absorption processes of dark matter down to 10 meV in mass. Combined with its widespread use as an alternative to silicon in other detector technologies and its availability compared to diamond, our results demonstrate that SiC holds much promise as a novel dark matter detector.
Forward citations
Cited by 7 Pith papers
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Spin-Dependent Scattering of Sub-GeV Dark Matter: Models and Constraints
A new calculation of spin-dependent sub-GeV dark matter phonon scattering shows only the light scalar mediator model retains testable parameter space, conditional on the supernova trapping window.
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Coherence from interference: a solvable model of sub-GeV dark matter-nucleus scattering
In an exactly solvable 1D lattice, coherent and incoherent DM-nucleus structure factors differ only by a crystal-momentum delta function that becomes unimportant for n≥2 phonons, validating hybrid Inc+LW rate calculations.
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Dark Matter Weather: Probing Sub-GeV Interactions with Earth-Shielding Modulation
Daily Earth-shielding modulation of sub-GeV dark matter can separate dark-matter–electron from dark-matter–nucleon scattering, and the isoangle shape statistic provides a new validation handle for liquid-noble detectors.
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Direct Detection of Leptophobic Dark Matter with Electronic Collective Excitations
Leptophobic dark matter can excite plasmons in silicon through hadronic loops, and SENSEI data now constrain its nucleon cross section down to ~1e-31 cm^2 in the sub-MeV mass range.
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SPLENDOR: a novel detector platform to search for light dark matter with narrow-gap semiconductors
A dark matter detector platform combining a 60 meV-gap semiconductor (Eu5In2Sb6) with cryogenic HEMT readout and daily modulation analysis is presented, with projected sensitivity to sub-MeV dark matter.
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Unconventional Materials for Light Dark Matter Detection
TiSe2, Sr2RuO4, and hole-doped diamond are projected to improve sub-MeV dark matter detection reaches by one to three orders of magnitude over existing proposals, with directional sensitivity from their anisotropic responses.
- First High-Throughput Evaluation of Dark Matter Detector Materials
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