Detection of sub-MeV dark matter with three-dimensional Dirac materials

Yonit Hochberg, Yonatan Kahn, Mariangela Lisanti, Kathryn M. Zurek, Adolfo G. Grushin, Roni Ilan, Sinéad M. Griffin, Zhen Fei Liu, Sophie F. Weber, Jeffrey B. Neaton

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We propose the use of three-dimensional Dirac materials as targets for direct detection of sub-MeV dark matter. Dirac materials are characterized by a linear dispersion for low-energy electronic excitations, with a small band gap of O(meV) if lattice symmetries are broken. Dark matter at the keV scale carrying kinetic energy as small as a few meV can scatter and excite an electron across the gap. Alternatively, bosonic dark matter as light as a few meV can be absorbed by the electrons in the target. We develop the formalism for dark matter scattering and absorption in Dirac materials and calculate the experimental reach of these target materials. We find that Dirac materials can play a crucial role in detecting dark matter in the keV to MeV mass range that scatters with electrons via a kinetically mixed dark photon, as the dark photon does not develop an in-medium effective mass. The same target materials provide excellent sensitivity to absorption of light bosonic dark matter in the meV to hundreds of meV mass range, superior to all other existing proposals when the dark matter is a kinetically mixed dark photon.

Original languageEnglish (US)
Article number015004
JournalPhysical Review D
Volume97
Issue number1
DOIs
StatePublished - Jan 1 2018

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dark matter
photons
electrons
proposals
broken symmetry
kinetic energy
formalism
sensitivity
scattering
electronics
excitation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Hochberg, Y., Kahn, Y., Lisanti, M., Zurek, K. M., Grushin, A. G., Ilan, R., ... Neaton, J. B. (2018). Detection of sub-MeV dark matter with three-dimensional Dirac materials. Physical Review D, 97(1), [015004]. https://doi.org/10.1103/PhysRevD.97.015004
Hochberg, Yonit ; Kahn, Yonatan ; Lisanti, Mariangela ; Zurek, Kathryn M. ; Grushin, Adolfo G. ; Ilan, Roni ; Griffin, Sinéad M. ; Liu, Zhen Fei ; Weber, Sophie F. ; Neaton, Jeffrey B. / Detection of sub-MeV dark matter with three-dimensional Dirac materials. In: Physical Review D. 2018 ; Vol. 97, No. 1.
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Hochberg, Y, Kahn, Y, Lisanti, M, Zurek, KM, Grushin, AG, Ilan, R, Griffin, SM, Liu, ZF, Weber, SF & Neaton, JB 2018, 'Detection of sub-MeV dark matter with three-dimensional Dirac materials', Physical Review D, vol. 97, no. 1, 015004. https://doi.org/10.1103/PhysRevD.97.015004

Detection of sub-MeV dark matter with three-dimensional Dirac materials. / Hochberg, Yonit; Kahn, Yonatan; Lisanti, Mariangela; Zurek, Kathryn M.; Grushin, Adolfo G.; Ilan, Roni; Griffin, Sinéad M.; Liu, Zhen Fei; Weber, Sophie F.; Neaton, Jeffrey B.

In: Physical Review D, Vol. 97, No. 1, 015004, 01.01.2018.

Research output: Contribution to journalArticle

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AU - Kahn, Yonatan

AU - Lisanti, Mariangela

AU - Zurek, Kathryn M.

AU - Grushin, Adolfo G.

AU - Ilan, Roni

AU - Griffin, Sinéad M.

AU - Liu, Zhen Fei

AU - Weber, Sophie F.

AU - Neaton, Jeffrey B.

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N2 - We propose the use of three-dimensional Dirac materials as targets for direct detection of sub-MeV dark matter. Dirac materials are characterized by a linear dispersion for low-energy electronic excitations, with a small band gap of O(meV) if lattice symmetries are broken. Dark matter at the keV scale carrying kinetic energy as small as a few meV can scatter and excite an electron across the gap. Alternatively, bosonic dark matter as light as a few meV can be absorbed by the electrons in the target. We develop the formalism for dark matter scattering and absorption in Dirac materials and calculate the experimental reach of these target materials. We find that Dirac materials can play a crucial role in detecting dark matter in the keV to MeV mass range that scatters with electrons via a kinetically mixed dark photon, as the dark photon does not develop an in-medium effective mass. The same target materials provide excellent sensitivity to absorption of light bosonic dark matter in the meV to hundreds of meV mass range, superior to all other existing proposals when the dark matter is a kinetically mixed dark photon.

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