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Article: Zeeman-split mesoscopic transport through a normal-metal–quantum-dot–superconductor system with ac response

TitleZeeman-split mesoscopic transport through a normal-metal–quantum-dot–superconductor system with ac response
Authors
KeywordsPhysics
Issue Date2001
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B (Condensed Matter and Materials Physics), 2001, v. 64 n. 9, p. 094505:1-10 How to Cite?
AbstractWe have investigated the Zeeman-split mesoscopic transport through the normal-metal–quantum-dot–superconductor system applied with a microwave field. We employ BCS theory to describe the Hamiltonian of the superconducting lead. The time-averaged tunneling current formula is derived by using the Keldysh’s nonequilibrium Green-function technique in the Nambu representation. The multilevel quantum dot is considered for the noninteraction system in the calculations. The spin split Andreev reflection and photon-electron pumping behaviors are investigated in the presence of a Zeeman magnetic field. The resonant structure versus Zeeman energy and gate voltage is revealed. The Zeeman-split photon-assisted I-V characteristics are evaluated for the single-channel quantum-dot system. By adjusting the Zeeman magnetic field, we can obtain a large resonant tunneling current even if in the Andreev reflection regime. The current appears to have interesting structures versus Zeeman energy for the multichannel quantum-dot system associated with a different gate voltage. The negative and positive current appear in the symmetric forms by controlling the Zeeman field.
Persistent Identifierhttp://hdl.handle.net/10722/43344
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhao, HKen_HK
dc.contributor.authorWang, Jen_HK
dc.date.accessioned2007-03-23T04:43:57Z-
dc.date.available2007-03-23T04:43:57Z-
dc.date.issued2001en_HK
dc.identifier.citationPhysical Review B (Condensed Matter and Materials Physics), 2001, v. 64 n. 9, p. 094505:1-10en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43344-
dc.description.abstractWe have investigated the Zeeman-split mesoscopic transport through the normal-metal–quantum-dot–superconductor system applied with a microwave field. We employ BCS theory to describe the Hamiltonian of the superconducting lead. The time-averaged tunneling current formula is derived by using the Keldysh’s nonequilibrium Green-function technique in the Nambu representation. The multilevel quantum dot is considered for the noninteraction system in the calculations. The spin split Andreev reflection and photon-electron pumping behaviors are investigated in the presence of a Zeeman magnetic field. The resonant structure versus Zeeman energy and gate voltage is revealed. The Zeeman-split photon-assisted I-V characteristics are evaluated for the single-channel quantum-dot system. By adjusting the Zeeman magnetic field, we can obtain a large resonant tunneling current even if in the Andreev reflection regime. The current appears to have interesting structures versus Zeeman energy for the multichannel quantum-dot system associated with a different gate voltage. The negative and positive current appear in the symmetric forms by controlling the Zeeman field.en_HK
dc.format.extent138197 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.titleZeeman-split mesoscopic transport through a normal-metal–quantum-dot–superconductor system with ac responseen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=64&issue=9&spage=094505:1&epage=10&date=2001&atitle=Zeeman-split+mesoscopic+transport+through+a+normal-metal–quantum-dot–superconductor+system+with+ac+responseen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.64.094505en_HK
dc.identifier.scopuseid_2-s2.0-0035448598-
dc.identifier.isiWOS:000170726000096-

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