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Article: Mesoscopic transport through toroidal carbon nanotubes threaded with a THz magnetic flux

TitleMesoscopic transport through toroidal carbon nanotubes threaded with a THz magnetic flux
Authors
KeywordsElectronic transport in interface structures
Nanotubes
Fullerenes and realted materials
Electronic structure of nanoscale materials: clusters, nonoparticles, nonotubes, and nanocrystals
Issue Date2004
PublisherSpringer-Verlag. The Journal's web site is located at http://www.edpsciences.org/journal/index.cfm?edpsname=epjb
Citation
European Physical Journal B Condensed Matter, 2004, v. 40 n. 1, p. 93-102 How to Cite?
AbstractWe have investigated the quantum transport through mesoscopic systems with a toroidal carbon nanotube coupled with two metal leads (N-TCN-N) threaded with an ac magnetic flux. The energy shifting takes place by applying the magnetic flux, and this shifting arises from both the dc and ac components of magnetic flux. The dc magnetic flux induces the periodic variation of energy gap E g of the TCN, and the ac magnetic flux component always increases the energy gap. As the photon energy is larger than the energy gap , the electrons in the valence band can jump to the conductance band at zero temperature, and the tunneling current appears for , ( ). The differential conductance and tunneling current display clear effect of ac flux by modifying the current oscillation structures. The photon-assisted tunneling current exhibits stair-like I-V characteristics, and it shows different behaviors for different TCN systems. The magnitude of the current is suppressed by the applied ac flux. We also present the time-dependent current evolution, which is contributed by the oscillating current components.
Persistent Identifierhttp://hdl.handle.net/10722/48657
ISSN
2015 Impact Factor: 1.223
2015 SCImago Journal Rankings: 0.524
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhao, HKen_HK
dc.contributor.authorWang, Jen_HK
dc.date.accessioned2008-05-22T04:20:28Z-
dc.date.available2008-05-22T04:20:28Z-
dc.date.issued2004en_HK
dc.identifier.citationEuropean Physical Journal B Condensed Matter, 2004, v. 40 n. 1, p. 93-102en_HK
dc.identifier.issn1434-6028en_HK
dc.identifier.urihttp://hdl.handle.net/10722/48657-
dc.description.abstractWe have investigated the quantum transport through mesoscopic systems with a toroidal carbon nanotube coupled with two metal leads (N-TCN-N) threaded with an ac magnetic flux. The energy shifting takes place by applying the magnetic flux, and this shifting arises from both the dc and ac components of magnetic flux. The dc magnetic flux induces the periodic variation of energy gap E g of the TCN, and the ac magnetic flux component always increases the energy gap. As the photon energy is larger than the energy gap , the electrons in the valence band can jump to the conductance band at zero temperature, and the tunneling current appears for , ( ). The differential conductance and tunneling current display clear effect of ac flux by modifying the current oscillation structures. The photon-assisted tunneling current exhibits stair-like I-V characteristics, and it shows different behaviors for different TCN systems. The magnitude of the current is suppressed by the applied ac flux. We also present the time-dependent current evolution, which is contributed by the oscillating current components.en_HK
dc.format.extent212420 bytes-
dc.format.extent1155549 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeimage/jpeg-
dc.languageengen_HK
dc.publisherSpringer-Verlag. The Journal's web site is located at http://www.edpsciences.org/journal/index.cfm?edpsname=epjben_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsThe original publication is available at www.springerlink.comen_HK
dc.subjectElectronic transport in interface structuresen_HK
dc.subjectNanotubesen_HK
dc.subjectFullerenes and realted materialsen_HK
dc.subjectElectronic structure of nanoscale materials: clusters, nonoparticles, nonotubes, and nanocrystalsen_HK
dc.titleMesoscopic transport through toroidal carbon nanotubes threaded with a THz magnetic fluxen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1434-6028&volume=40&issue=1&spage=93&epage=102&date=2004&atitle=Mesoscopic+transport+through+toroidal+carbon+nanotubes+threaded+with+a+THz+magnetic+fluxen_HK
dc.identifier.emailZhao, HK: zhaohonk@yahoo.comen_HK
dc.identifier.emailWang, J: jianwang@hkusub.hku.hken_HK
dc.description.naturepostprinten_HK
dc.identifier.doi10.1140/epjb/e2004-00243-5en_HK
dc.identifier.scopuseid_2-s2.0-4544255243-
dc.identifier.hkuros91985-
dc.identifier.isiWOS:000223910200012-

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