New constraints on dark matter from superconducting nanowires

Yonit Hochberg; Benjamin V. Lehmann; Ilya Charaev; Jeff Chiles; Marco Colangelo; Sae Woo Nam; Karl K. Berggren

doi:10.1103/PhysRevD.106.112005

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New constraints on dark matter from superconducting nanowires

Yonit Hochberg, Benjamin V. Lehmann, Ilya Charaev, Jeff Chiles, Marco Colangelo, Sae Woo Nam, Karl K. Berggren

DOI 10.1103/PhysRevD.106.112005 · Physical Review D

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Abstract

Superconducting nanowires, a mature technology originally developed for quantum sensing, can be used as a target and sensor with which to search for dark matter interactions with electrons. Here we report on a 180-hour measurement of a tungsten silicide superconducting nanowire device with a mass of 4.3 nanograms. We use this to place new constraints on dark matter–electron interactions, including the strongest terrestrial constraints to date on sub-MeV (sub-eV) dark matter that interacts with electrons via scattering (absorption) processes.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
WSi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
NbN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown