WIGNER SOLID DYNAMICS ON NORMAL AND SUPERFLUID HE-3

We report the results of first experimental and theoretical studies of two-dimensional (2D) Wigner solid (WS) motion on the free surface of normal and superfluid He-3, at ultra-low temperatures down to 0.24 mK. It is shown that the WS transport is determined thoroughly by the bul k Fermi-quasiparticle scattering at the surface dimple sublattice prod uced by localized electrons. Besides interesting electronic properties of the system, the 2D WS serves as a powerful probe for the bulk prop erties of superffuid He-3. (C) 1998 Elsevier Science B.V. All rights r eserved.