Nonequilibrium phenomena in adjacent electrically isolated   nanostructures
  We report on nonequilibrium interaction phenomena between adjacent but electrostatically separated nanostructures in GaAs. A current flowing in one externally biased nanostructure causes an excitation of electrons in a circuit of a second nanostructure. As a result we observe a dc current generated in the unbiased second nanostructure. The results can be qualitatively explained in terms of acoustic phonon based energy transfer between the two mutually isolated circuits. 
V.S. Khrapai, S. Ludwig, J.P. Kotthaus, H.P. Tranitz, W. Wegscheider