The dip-effect in conduction of 2D electron at a helium film on a rough substrate
University Konstanz, D-7750 Konstanz, Germany
S. Nazin, and V. Shikin
Institute of Solid State Physics RAS, Chernogolovka, Moscow region, 142432, Russia
Received November 1, 2007
The phenomenon generally called the «dip-effect » in conduction of 2D electrons at a helium film on a rough substrate is discussed. A special case of the dip-effect appearing in moving 2D electrons along the helium film covering a periodically corrugated substrate is considered. Arguments for extending the outlined scenario to 2D electrons above the substrates with arbitrary corrugation on difficulties of this approach are presented.
PACS: 67.25.bh Films and restricted geometries; PACS: 73.25.+i Surface conductivity and carrierphenomena.