Speaker
Description
We propose to analyse the frequency-dependent nonlinear Hall effect in a Dirac or Weyl semimetal (D/WSM) as a possible way to detect dark matter particles, assumed here to be massive dark photons. The dark matter is still an unidentified, albeit dominant component of the matter in the Universe, with important consequences for the cosmological models. The dark photon is one of many candidates for dark matter. It is expected to interact with the standard model photon with the coupling constant $\alpha\ll 1$. We use a kinetic equation taking into account two coupled U(1)-gauge fields, one being the standard Maxwell electromagnetic field and the other corresponding to the dark sector. The resulting non-linear currents depend on the coupling constant $\alpha$. The conservative estimate [1] shows that the technique should have a sensitivity of the order of 10$^{-9}$ and be applicable for an experimentally relevant range of masses.
[1] Marek Rogatko and Karol I. Wysokinski, Charge transport in chiral solids as a possible tool in search of dark matter signals, Phys. Rev. D 108, 104062 (2023).
