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Detecting Light Dark Matter with Magnons
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Scattering of light dark matter with sub-eV energy deposition can be detected with collective excitations in condensed matter systems. When dark matter has spin-independent couplings to atoms or ions, it has been shown to efficiently excite phonons. Here we show that, if dark matter couples to the electron spin, magnon excitations in materials with magnetic dipole order offer a promising detection path. We derive general formulae for single magnon excitation rates from dark matter scattering, and demonstrate as a proof of principle the projected reach of a yttrium iron garnet target for several dark matter models with spin-dependent interactions. This highlights the complementarity of various collective excitations in probing different dark matter interactions.
Forward citations
Cited by 3 Pith papers
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Probing Supernova Neutrino Boosted Dark Matter with Collective Excitation
Galactic supernova neutrino boosted dark matter can produce plasmon excitations in silicon detectors, improving sub-MeV dark matter sensitivity by 3 to 4 orders of magnitude over Super-K.
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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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