Shot noise in nanoscale conductors from first principles

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dc.contributorVirginia Techen
dc.contributor.authorChen, Y. C.en
dc.contributor.authorDi Ventra, M.en
dc.contributor.departmentPhysicsen
dc.date.accessed2014-04-23en
dc.date.accessioned2014-05-07T15:37:06Zen
dc.date.available2014-05-07T15:37:06Zen
dc.date.issued2003-04en
dc.description.abstractWe describe a field-theoretic approach to calculate quantum shot noise in nanoscale conductors from first principles. Our starting point is the second-quantization field operator to calculate shot noise in terms of single quasiparticle wave functions obtained self-consistently within the density-functional theory. The approach is valid in both linear and nonlinear response and is particularly suitable in studying shot noise in atomic-scale conductors. As an example, we study shot noise in Si atomic wires between metal electrodes. We find that shot noise is strongly nonlinear as a function of bias and it is enhanced for one- and two-Si wires due to the large contribution from the metal electrodes. For longer wires it shows an oscillatory behavior for even and odd number of atoms with opposite trend with respect to the conductance, indicating that current fluctuations persist with increasing wire length.en
dc.description.sponsorshipNational Science Foundation Grants Nos. DMR-01-02277, DMR-01-33075en
dc.description.sponsorshipCarilion Biomedical Instituteen
dc.description.sponsorshipOak Ridge Associated Universitiesen
dc.description.sponsorshipAcknowledgment is also made to the Donors of The Petroleum Research Fund, administered by the American Chemical Societyen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationChen, Y. C.; Di Ventra, M., "Shot noise in nanoscale conductors from first principles," Phys. Rev. B 67, 153304 DOI: http://dx.doi.org/10.1103/PhysRevB.67.153304en
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.67.153304en
dc.identifier.issn1098-0121en
dc.identifier.urihttp://hdl.handle.net/10919/47887en
dc.identifier.urlhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.67.153304en
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectmultiterminal diffusive conductorsen
dc.subjecttransport-propertiesen
dc.subjectelectron-gasen
dc.subjectuniversalityen
dc.subjectsystemsen
dc.subjectsuppressionen
dc.subjectscatteringen
dc.subjectcontactsen
dc.subjectwiresen
dc.subjectphysics, condensed matteren
dc.titleShot noise in nanoscale conductors from first principlesen
dc.title.serialPhysical Review Ben
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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