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Article: Hamiltonian approach to the ac Josephson effect in superconducting-normal hybrid systems

TitleHamiltonian approach to the ac Josephson effect in superconducting-normal hybrid systems
Authors
KeywordsPhysics
Issue Date2002
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B (Condensed Matter and Materials Physics), 2002, v. 65 n. 7, p. 075315:1-11 How to Cite?
AbstractThe ac Josephson effect in hybrid systems of a normal mesoscopic conductor coupled to two superconducting (S) leads is investigated theoretically. A general formula of the ac components of time-dependent current is derived, which is valid for arbitrary interactions in the normal region. We apply this formula to analyze a S-normal-S system where the normal region is a noninteracting single-level quantum dot. We report the physical behavior of time-averaged nonequilibrium distribution of electrons in the quantum dot, the formation of Andreev resonance states, and ac components of the time-dependent current. The distribution is found to exhibit a population inversion; and all Andreev resonance states between the superconducting gap Δ carry the same amount of the current and in the same flow direction. The ac components of time-dependent current show strong oscillatory behavior in marked contrast to the subharmonic gap structure of the average current.
Persistent Identifierhttp://hdl.handle.net/10722/43338
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorSun, QFen_HK
dc.contributor.authorGuo, Hen_HK
dc.contributor.authorWang, Jen_HK
dc.date.accessioned2007-03-23T04:43:51Z-
dc.date.available2007-03-23T04:43:51Z-
dc.date.issued2002en_HK
dc.identifier.citationPhysical Review B (Condensed Matter and Materials Physics), 2002, v. 65 n. 7, p. 075315:1-11en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43338-
dc.description.abstractThe ac Josephson effect in hybrid systems of a normal mesoscopic conductor coupled to two superconducting (S) leads is investigated theoretically. A general formula of the ac components of time-dependent current is derived, which is valid for arbitrary interactions in the normal region. We apply this formula to analyze a S-normal-S system where the normal region is a noninteracting single-level quantum dot. We report the physical behavior of time-averaged nonequilibrium distribution of electrons in the quantum dot, the formation of Andreev resonance states, and ac components of the time-dependent current. The distribution is found to exhibit a population inversion; and all Andreev resonance states between the superconducting gap Δ carry the same amount of the current and in the same flow direction. The ac components of time-dependent current show strong oscillatory behavior in marked contrast to the subharmonic gap structure of the average current.en_HK
dc.format.extent173126 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.titleHamiltonian approach to the ac Josephson effect in superconducting-normal hybrid systemsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=65&issue=7&spage=075315:1&epage=11&date=2002&atitle=Hamiltonian+approach+to+the+ac+Josephson+effect+in+superconducting-normal+hybrid+systemsen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.65.075315en_HK
dc.identifier.scopuseid_2-s2.0-0037084625-
dc.identifier.hkuros65403-
dc.identifier.isiWOS:000174030900069-

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