Electron solid at the Si surface in zero magnetic field?
Kravchenko S. V., Pudalov V.M., Campbell J., D'lorio M.
We report the observation of an electric field threshold conduction and saturation of the cur rent-voltage characteristics which are accompanied by ac voltage generation in low-density two-dimensional electron layer at the Si surface in zero magnetic field. The observed effects seem to be inconsistent with single-particle conduction and support the formation of a pinned quantum electron solid in zero magnetic field.