CORRUGATION-INDUCED TRANSVERSE VOLTAGE IN A LATERAL SUPERLATTICE

Lateral superlattices are fabricated with a unidirectional potential modulation. The current is passed under an angle α with respect to the lattice direction. In the quantum Hall regime the resistivities, calculated from the respective voltage drops along and perpendicular to the direction of current flow, agree with predictions of tensor calculus. Similar to the Hall effect but in the absence of a magnetic field, a finite voltage drop is detected perpendicular to the current direction. A model based on the ballistic motion of the electrons explains this effect and relates the size of this voltage drop directly to the amplitude of the potential modulation. © 1995 The American Physical Society.