Abstract
The resistivity varies by 7 decades and the intensity of its fluctuations varies by 17 decades in composite films of Pt and for a wide range of metal volume percent and temperature K. The power spectral density with at all and . The normalized noise intensity rises by with decreasing and saturates below a metal-insulator transition, . Results implicate a dual conduction mechanism for composites combining noisy tunneling and quiet metallic paths.
- Received 26 August 1985
DOI:https://doi.org/10.1103/PhysRevLett.55.2212
©1985 American Physical Society