MAGNETOTRANSPORT IN PERIODICALLY MODULATED QUANTUM WIRES

Quantum wires with an artificially designed periodic potential have be en fabricated by etching a chain of antidots along the central wire ax is. The resistivity rho(xx) in the presence of a perpendicular magneti c field shows distinct peaks in the low magnetic field regime that can be explained by localized orbits around one antidot or between two ne ighboring antidots. By changing the lateral position of the antidot ch ain on the wire from the central axis to the wire side walls, a locali zed orbit in the region between four antidots has been detected. (C) 1 996 American Institute of Physics.