2D polarons in high magnetic fields on the surface of liquid helium films

We report on measurements proving the polaronic effect in a 2D electron system prepared on helium films covering a quartz-glass substrate. In bulk systems the measured magnetoconductivity follows the extended self-consistent Born approximation (SCBA) theory up to 20 T. On films we achieved conditions at which the calculated binding energies where larger than k(B)T and the magnetoconductivity data could be interpreted by adding the collision frequency of the electron plus its associated dimple to the collision frequency caused by gas atom scattering.