One-dimensional electron system over liquid helium

A system close to a one-dimensional (1D) electron system on superfluid heli um is realized in the experiments. A profiled substrate with a small dielec tric constant is used to create a set of parallel channels on the surface o f liquid helium. The mobility of carriers was measured in this system in th e temperature range 0.5-1.8 K. For clean substrates the electron mobility i ncreases with decreasing temperature and reaches high values at low tempera tures. The results of experiments are found to be in a good agreement with the existing theory. (C), 2000 Elsevier Science B.V. All rights reserved.