Accounting for the stochastic fraction of spins that relax even when thermal diffusion is fast releases Zeeman energy that lowers the avalanche threshold in SMM dark matter detectors.
Particle Detection Using Magnetic Avalanches in Single-Molecule Magnet Crystals
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abstract
The detection of a single quantum of energy with high efficiency and a low false positive rate is of considerable scientific interest, from serving as single quantum sensors of optical and infra-red photons to enabling the direct detection of low-mass dark matter. We confirm our initial experimental demonstration of magnetic avalanches induced by scattering of quanta in single-molecule magnet (SMM) crystals made of Mn$_{12}$-acetate, establishing the use of SMMs as particle detectors for the first time. Although the current setup has an energy threshold in the MeV regime, our results motivate the exploration of a wide variety of SMMs whose properties could allow for detection of sub-eV energy depositions.
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Refined Sensitivity Estimates for Single-Molecule Magnet Dark Matter Detectors
Accounting for the stochastic fraction of spins that relax even when thermal diffusion is fast releases Zeeman energy that lowers the avalanche threshold in SMM dark matter detectors.