Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2007-07-27
Fluctuations and Noise Letters, v. 5, pp. L443-L456 (2005)
Physics
Condensed Matter
Statistical Mechanics
14 pages, 3 figures, final version
Scientific paper
We describe a mechanism, which links the long-range potential fluctuations induced by charged defects to the low frequency resistance noise widely known as 1/f noise. This mechanism is amenable to the first principles microscopic calculation of the noise spectrum, which includes the absolute noise intensity. We have performed such a calculation for the thin films of hydrogenated amorphous silicon (a-Si:H) under the condition that current flows perpendicular to the plane of the films, and found a very good agreement between the theoretical noise intensity and the measured one. The mechanism described is quite general. It should be present in a broad class of systems containing poorly screened charged defects.
Bakker J. P. R.
Dijkhuis Jaap I.
Fine Boris V.
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