NONLINEAR TRANSPORT OF ELECTRONS IN A QUASI-ONE-DIMENSIONAL CHANNEL ON THE LIQUID-HELIUM SURFACE

The nonlinear transport of electrons bound in quasi-one-dimensional ch annels on the surface of liquid helium is studied theoretically in the case of large clamping fields normal to the surface. It is shown that , due to the weakness of the electron-ripplon interaction, the nonline ar effects in the electron mobility arise at driving electric fields n ear 10(-2) V/cm. The mobility is an increasing function of the driving field for all clamping fields considered. The calculations are carrie d out in the two limiting regimes corresponding to different roles of the electron-electron correlations. The results in the two approximati ons differ significantly, which allows us to check out the role of the electron-electron interaction in the quasi-one-dimensional charge sys tem through a comparison with experimental results.