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Article: Time-dependent quantum transport: Direct analysis in the time domain

TitleTime-dependent quantum transport: Direct analysis in the time domain
Authors
KeywordsPhysics
Issue Date2005
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B (Condensed Matter and Materials Physics), 2005, v. 71 n. 7, p. 075317:1-10 How to Cite?
AbstractWe present a numerical approach for solving time-dependent quantum transport problems in molecular electronics. By directly solving Green's functions in the time domain, this approach does not rely on the wide-band limit approximation thereby is capable of taking into account the detailed electronic structures of the device leads which is important for molecular electronics. Using this approach we investigate two typical situations: current driven by a bias voltage pulse and by a periodic field, illustrating that the computational requirement is no more than an inversion of a relatively small triangular matrix plus several matrix multiplications. We then present numerical results of time-dependent charge current for a one-dimensional atomic chain. The numerical solution recovers known results in the wide-band limit, and reveals physical behavior for leads with finite bandwidth.
Persistent Identifierhttp://hdl.handle.net/10722/43453
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhu, Yen_HK
dc.contributor.authorMaciejko, Jen_HK
dc.contributor.authorJi, Ten_HK
dc.contributor.authorGuo, Hen_HK
dc.contributor.authorWang, Jen_HK
dc.date.accessioned2007-03-23T04:45:59Z-
dc.date.available2007-03-23T04:45:59Z-
dc.date.issued2005en_HK
dc.identifier.citationPhysical Review B (Condensed Matter and Materials Physics), 2005, v. 71 n. 7, p. 075317:1-10en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43453-
dc.description.abstractWe present a numerical approach for solving time-dependent quantum transport problems in molecular electronics. By directly solving Green's functions in the time domain, this approach does not rely on the wide-band limit approximation thereby is capable of taking into account the detailed electronic structures of the device leads which is important for molecular electronics. Using this approach we investigate two typical situations: current driven by a bias voltage pulse and by a periodic field, illustrating that the computational requirement is no more than an inversion of a relatively small triangular matrix plus several matrix multiplications. We then present numerical results of time-dependent charge current for a one-dimensional atomic chain. The numerical solution recovers known results in the wide-band limit, and reveals physical behavior for leads with finite bandwidth.en_HK
dc.format.extent213317 bytes-
dc.format.extent25600 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.en_HK
dc.subjectPhysicsen_HK
dc.titleTime-dependent quantum transport: Direct analysis in the time domainen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=71&issue=7&spage=075317:1&epage=10&date=2005&atitle=Time-dependent+quantum+transport:+Direct+analysis+in+the+time+domainen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.71.075317en_HK
dc.identifier.scopuseid_2-s2.0-15744377849-
dc.identifier.hkuros97381-
dc.identifier.isiWOS:000228013600067-

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