Abstract
I consider hopping magnetoresistance R of a two-dimensional insulator with small metallic impurities. I prove that if impurity density n is low (<1, where is the impurity Bohr radius), R increases with magnetic field B. If >1, then R(B) has a minimum. In both cases, in high magnetic field lnR∝ √B/T , with the dependence on temperature T characteristic of one-dimensional hopping.
- Received 1 October 1990
DOI:https://doi.org/10.1103/PhysRevB.43.2435
©1991 American Physical Society