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Title: Anomalous crossover between thermal and shot noise in macroscopic diffusive conductors
Author: Gomila Lluch, Gabriel
Reggiani, L. (Lino), 1941-
Keywords: Soroll electrònic
Fluctuations (Physics)
Electronic noise
Fluctuations (Physics)
Issue Date: 2000
Publisher: The American Physical Society
Abstract: We predict the existence of an anomalous crossover between thermal and shot noise in macroscopic diffusive conductors. We first show that, besides thermal noise, these systems may also exhibit shot noise due to fluctuations of the total number of carriers in the system. Then we show that at increasing currents the crossover between the two noise behaviors is anomalous, in the sense that the low-frequency current spectral density displays a region with a superlinear dependence on the current up to a cubic law. The anomaly is due to the nontrivial coupling in the presence of the long-range Coulomb interaction among the three time scales relevant to the phenomenon, namely, diffusion, transit, and dielectric relaxation time.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 2000, vol. 62, núm. 12, p. 8068-8071
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)

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