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Article: Current conservation in two-dimensional ac transport

TitleCurrent conservation in two-dimensional ac transport
Authors
KeywordsPhysics
Issue Date1997
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B (Condensed Matter), 1997, v. 55 n. 15, p. 9770-9774 How to Cite?
AbstractThe electric current conservation in a two-dimensional quantum wire under a time-dependent field is investigated. Such a conservation is obtained as the global density of states contribution to the emittance is balanced by the contribution due to the internal charge response inside the sample. However when the global partial density of states is approximately calculated using scattering matrix only, correction terms are needed to obtain precise current conservation. We have derived these corrections analytically using a specific two-dimensional system. We found that when the incident energy E is near the first subband, our result reduces to the one-dimensional result. As E approaches to the nth subband with n>1, the correction term diverges. This explains the systematic deviation to precise current conservation observed in a previous numerical calculation.
Persistent Identifierhttp://hdl.handle.net/10722/43211
ISSN
2001 Impact Factor: 3.07
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, Jen_HK
dc.contributor.authorZheng, Qen_HK
dc.contributor.authorGuo, Hen_HK
dc.date.accessioned2007-03-23T04:41:23Z-
dc.date.available2007-03-23T04:41:23Z-
dc.date.issued1997en_HK
dc.identifier.citationPhysical Review B (Condensed Matter), 1997, v. 55 n. 15, p. 9770-9774en_HK
dc.identifier.issn0163-1829en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43211-
dc.description.abstractThe electric current conservation in a two-dimensional quantum wire under a time-dependent field is investigated. Such a conservation is obtained as the global density of states contribution to the emittance is balanced by the contribution due to the internal charge response inside the sample. However when the global partial density of states is approximately calculated using scattering matrix only, correction terms are needed to obtain precise current conservation. We have derived these corrections analytically using a specific two-dimensional system. We found that when the incident energy E is near the first subband, our result reduces to the one-dimensional result. As E approaches to the nth subband with n>1, the correction term diverges. This explains the systematic deviation to precise current conservation observed in a previous numerical calculation.en_HK
dc.format.extent120073 bytes-
dc.format.extent25600 bytes-
dc.format.extent5108 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.format.mimetypetext/plain-
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). Copyright © American Physical Society.en_HK
dc.subjectPhysicsen_HK
dc.titleCurrent conservation in two-dimensional ac transporten_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0163-1829&volume=55&issue=15&spage=9770&epage=9774&date=1997&atitle=Current+conservation+in+two-dimensional+ac+transporten_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.55.9770en_HK
dc.identifier.scopuseid_2-s2.0-0001702053-
dc.identifier.hkuros29335-
dc.identifier.isiWOS:A1997WV25100098-

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