Abstract
We show that noise in a two-dimensional electron gas with hopping conduction can be explained by the modulation of conducting paths by fluctuating occupancy of nonconducting states. The noise is sensitive to the structure of the critical hopping network, which is varied by changing electron concentration, sample size and temperature. With increasing temperature, it clearly reveals the crossover between different hopping regimes.
- Received 17 July 2001
DOI:https://doi.org/10.1103/PhysRevB.64.201318
©2001 American Physical Society