Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/10600
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)
Semiconductors
Electronic noise
Fluctuations (Physics)
Semiconductors
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 http://dx.doi.org/10.1103/PhysRevB.62.8068
It is part of: Physical Review B, 2000, vol. 62, núm. 12, p. 8068-8071
URI: http://hdl.handle.net/2445/10600
ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Electrònica)

Files in This Item:
File Description SizeFormat 
526799.pdf61.92 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.