Abstract
Quantum-transport equations and relaxation frequencies are derived for a superlattice array of quantum wires, taking into account dynamical screening and the tunneling between the wires in the tight-binding approximation. The momentum relaxation frequency for scattering by volume and sheet impurities is evaluated and shown to depend on the superlattice period l in a nontrivial manner. Competition between tunneling and screening effects results in a particular value of l for which the relaxation frequency is minimum corresponding to a maximum conduction.
- Received 4 November 1991
DOI:https://doi.org/10.1103/PhysRevB.45.13572
©1992 American Physical Society