The magnetoconductivity s(B) of a classical 2D electron crystal on superfluid4He is non-linear. Experimentally we find a contribution to s(B) which at constant field, gives s(B)8J x, the current density, while at constant current, s(B) 8 1/B. In this region the Hall velocity ¿H slowly approaches the ripplon velocity ¿I at the first reciprocal lattice vector, due to strong electron-ripplon interactions with the helium. The magnetoconductivity decreases sharply for ¿H>¿I. Fluctuations in s(B) are seen above the melting temperature.
Fozooni, P., Djerfi, K., Kristensen, A., Lea, M. J., Richardson, P. J., Santrich-Badal, A., ... Heijden, van der, R. W. (1996). Hall-velocity limited magnetoconductivity in a 2D Wigner solid. Czechoslovak Journal of Physics. Section B, 46(suppl. 1), 327-328. https://doi.org/10.1007/BF02569579