Shot noise anomalies in elastic nondegenerate diffusive conductors

We present a theoretical investigation of shot-noise properties in nondegenerate elastic diffusive conductors. Both Monte Carlo simulations and analytical approaches are used. Two interesting phenomena are found: (i) the display of enhanced shot noise for given energy dependences of the scattering t...

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Detalles Bibliográficos
Autores: Gomila Lluch, Gabriel, González, T., Reggiani, L. (Lino), 1941-
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2002
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/10603
Acceso en línea:https://hdl.handle.net/2445/10603
Access Level:acceso abierto
Palabra clave:Soroll electrònic
Mètode de Montecarlo
Semiconductors
Fluctuacions (Física)
Electronic noise
Monte Carlo method
Fluctuations (Physics)
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spelling Shot noise anomalies in elastic nondegenerate diffusive conductorsGomila Lluch, GabrielGonzález, T.Reggiani, L. (Lino), 1941-Soroll electrònicMètode de MontecarloSemiconductorsFluctuacions (Física)Electronic noiseMonte Carlo methodSemiconductorsFluctuations (Physics)We present a theoretical investigation of shot-noise properties in nondegenerate elastic diffusive conductors. Both Monte Carlo simulations and analytical approaches are used. Two interesting phenomena are found: (i) the display of enhanced shot noise for given energy dependences of the scattering time, and (ii) the recovery of full shot noise for asymptotic high applied bias. The first phenomenon is associated with the onset of negative differential conductivity in energy space that drives the system towards a dynamical electrical instability in excellent agreement with analytical predictions. The enhancement is found to be strongly amplified when the dimensionality in momentum space is lowered from three to two dimensions. The second phenomenon is due to the suppression of the effects of long-range Coulomb correlations that takes place when the transit time becomes the shortest time scale in the system, and is common to both elastic and inelastic nondegenerate diffusive conductors. These phenomena shed different light in the understanding of the anomalous behavior of shot noise in mesoscopic conductors, which is a signature of correlations among different current pulses.The American Physical Society200920092002info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion8 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/10603Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.66.245423Physical Review B, 2002, vol. 66, núm. 24, p. 245423-1-245423-8http://dx.doi.org/10.1103/PhysRevB.66.245423(c) The American Physical Society, 2002info:eu-repo/semantics/openAccessoai:recercat.cat:2445/106032026-05-29T05:05:01Z
dc.title.none.fl_str_mv Shot noise anomalies in elastic nondegenerate diffusive conductors
title Shot noise anomalies in elastic nondegenerate diffusive conductors
spellingShingle Shot noise anomalies in elastic nondegenerate diffusive conductors
Gomila Lluch, Gabriel
Soroll electrònic
Mètode de Montecarlo
Semiconductors
Fluctuacions (Física)
Electronic noise
Monte Carlo method
Semiconductors
Fluctuations (Physics)
title_short Shot noise anomalies in elastic nondegenerate diffusive conductors
title_full Shot noise anomalies in elastic nondegenerate diffusive conductors
title_fullStr Shot noise anomalies in elastic nondegenerate diffusive conductors
title_full_unstemmed Shot noise anomalies in elastic nondegenerate diffusive conductors
title_sort Shot noise anomalies in elastic nondegenerate diffusive conductors
dc.creator.none.fl_str_mv Gomila Lluch, Gabriel
González, T.
Reggiani, L. (Lino), 1941-
author Gomila Lluch, Gabriel
author_facet Gomila Lluch, Gabriel
González, T.
Reggiani, L. (Lino), 1941-
author_role author
author2 González, T.
Reggiani, L. (Lino), 1941-
author2_role author
author
dc.subject.none.fl_str_mv Soroll electrònic
Mètode de Montecarlo
Semiconductors
Fluctuacions (Física)
Electronic noise
Monte Carlo method
Semiconductors
Fluctuations (Physics)
topic Soroll electrònic
Mètode de Montecarlo
Semiconductors
Fluctuacions (Física)
Electronic noise
Monte Carlo method
Semiconductors
Fluctuations (Physics)
description We present a theoretical investigation of shot-noise properties in nondegenerate elastic diffusive conductors. Both Monte Carlo simulations and analytical approaches are used. Two interesting phenomena are found: (i) the display of enhanced shot noise for given energy dependences of the scattering time, and (ii) the recovery of full shot noise for asymptotic high applied bias. The first phenomenon is associated with the onset of negative differential conductivity in energy space that drives the system towards a dynamical electrical instability in excellent agreement with analytical predictions. The enhancement is found to be strongly amplified when the dimensionality in momentum space is lowered from three to two dimensions. The second phenomenon is due to the suppression of the effects of long-range Coulomb correlations that takes place when the transit time becomes the shortest time scale in the system, and is common to both elastic and inelastic nondegenerate diffusive conductors. These phenomena shed different light in the understanding of the anomalous behavior of shot noise in mesoscopic conductors, which is a signature of correlations among different current pulses.
publishDate 2002
dc.date.none.fl_str_mv 2002
2009
2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/10603
url https://hdl.handle.net/2445/10603
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.66.245423
Physical Review B, 2002, vol. 66, núm. 24, p. 245423-1-245423-8
http://dx.doi.org/10.1103/PhysRevB.66.245423
dc.rights.none.fl_str_mv (c) The American Physical Society, 2002
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The American Physical Society, 2002
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 8 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv The American Physical Society
publisher.none.fl_str_mv The American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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