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Detection of light dark matter with optical phonons in polar materials

Knapen, Simon and Lin, Tongyan and Pyle, Matt and Zurek, Kathryn M. (2018) Detection of light dark matter with optical phonons in polar materials. Physics Letters B, 785 . pp. 386-390. ISSN 0370-2693. doi:10.1016/j.physletb.2018.08.064.

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We show that polar materials are excellent targets for direct detection of sub-GeV dark matter due to the presence of gapped optical phonons as well as acoustic phonons with high sound speed. We take the example of Gallium Arsenide (GaAs), which has the properties needed for experimental realization, and where many results can be estimated analytically. We find GaAs has excellent reach to dark photon absorption, can completely cover the freeze-in benchmark for scattering via an ultralight dark photon, and is competitive with other proposals to detect sub-MeV dark matter scattering off nuclei.

Item Type:Article
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URLURL TypeDescription Paper
Knapen, Simon0000-0002-6733-9231
Lin, Tongyan0000-0003-4969-3285
Pyle, Matt0000-0002-3490-6754
Zurek, Kathryn M.0000-0002-2629-337X
Additional Information:© 2018 The author(s). Published by Elsevier. This is an open access article under the CC BY license ( Funded by SCOAP3. Received 22 May 2018, Revised 7 August 2018, Accepted 8 August 2018, Available online 31 August 2018. We thank Feliciano Giustino, Sinead Griffin, Harikrishnan Ramani, and Dan McKinsey for useful discussions and Sinead Griffin for comments on the manuscript and collaboration on future work. SK and KZ are supported by the DOE under contract DE-AC02-05CH11231, and SK is also supported in part by the National Science Foundation (NSF) under grants No. PHY-1316783 and No. PHY-1002399. This work was performed in part at the Aspen Center for Physics, which is supported by National Science Foundation grant PHY-1607611 and used resources of the National Energy Research Scientific Computing Center, which is supported by the Office of Science of the DoE under Contract No. DE-AC02-05CH11231.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02-05CH11231
Record Number:CaltechAUTHORS:20190613-164151837
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Official Citation:Simon Knapen, Tongyan Lin, Matt Pyle, Kathryn M. Zurek, Detection of light dark matter with optical phonons in polar materials, Physics Letters B, Volume 785, 2018, Pages 386-390, ISSN 0370-2693, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96436
Deposited By: George Porter
Deposited On:18 Jun 2019 23:08
Last Modified:16 Nov 2021 17:20

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