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Article: Photon-assisted Andreev tunneling through a mesoscopic hybrid system

TitlePhoton-assisted Andreev tunneling through a mesoscopic hybrid system
Authors
KeywordsPhysics
Issue Date1999
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B (Condensed Matter and Materials Physics), 1999, v. 59 n. 20, p. 13126-13138 How to Cite?
AbstractThe electron tunneling through a mesoscopic hybrid system, a normal-metal–quantum-dot–superconductor (N-QD-S) system where the intradot Coulomb interaction is neglected, in the presence of the time-varying external fields, has been investigated. By using the nonequilibrium Green-function method, the time-dependent current jL(t) and the average current 〈j(t)〉 are derived. The photon-assisted Andreev tunneling (PAAT) and the normal photon-assisted tunneling (PAT) are studied in detail. In the case of ħω<Δ, where ω is the frequency of external fields and Δ is the energy gap of the superconducting lead, the average current 〈j〉 vs the gate voltage exhibits a series of equal-interval PAAT peaks, with negative peaks on the left-hand side and positive peaks on the right-hand side of the original resonant peak in the absence of the external fields. This is very different from the N-QD-N system. While for ħω>Δ, various PAT processes cause a rather complicated dependence of the current on the gate voltage. In addition, the current–bias-voltage characteristics become more complicated: each Andreev reflection peak is split into side-band peaks and each current plateau is split into substep plateaus.
Persistent Identifierhttp://hdl.handle.net/10722/43283
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorSun, Qen_HK
dc.contributor.authorWang, Jen_HK
dc.contributor.authorLin, THen_HK
dc.date.accessioned2007-03-23T04:42:50Z-
dc.date.available2007-03-23T04:42:50Z-
dc.date.issued1999en_HK
dc.identifier.citationPhysical Review B (Condensed Matter and Materials Physics), 1999, v. 59 n. 20, p. 13126-13138en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43283-
dc.description.abstractThe electron tunneling through a mesoscopic hybrid system, a normal-metal–quantum-dot–superconductor (N-QD-S) system where the intradot Coulomb interaction is neglected, in the presence of the time-varying external fields, has been investigated. By using the nonequilibrium Green-function method, the time-dependent current jL(t) and the average current 〈j(t)〉 are derived. The photon-assisted Andreev tunneling (PAAT) and the normal photon-assisted tunneling (PAT) are studied in detail. In the case of ħω<Δ, where ω is the frequency of external fields and Δ is the energy gap of the superconducting lead, the average current 〈j〉 vs the gate voltage exhibits a series of equal-interval PAAT peaks, with negative peaks on the left-hand side and positive peaks on the right-hand side of the original resonant peak in the absence of the external fields. This is very different from the N-QD-N system. While for ħω>Δ, various PAT processes cause a rather complicated dependence of the current on the gate voltage. In addition, the current–bias-voltage characteristics become more complicated: each Andreev reflection peak is split into side-band peaks and each current plateau is split into substep plateaus.en_HK
dc.format.extent267357 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.titlePhoton-assisted Andreev tunneling through a mesoscopic hybrid systemen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=59&issue=20&spage=13126&epage=13138&date=1999&atitle=Photon-assisted+Andreev+tunneling+through+a+mesoscopic+hybrid+systemen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.59.13126en_HK
dc.identifier.scopuseid_2-s2.0-0001241630-
dc.identifier.hkuros47563-
dc.identifier.isiWOS:000080571000058-

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