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Article: Mesoscopic spin-flip transport through a quantum dot system responded by ac magnetic fields

TitleMesoscopic spin-flip transport through a quantum dot system responded by ac magnetic fields
Authors
KeywordsNanoelectronic devices
Electronic transport in mesoscopic systems
Mk Spin transport through surfaces
Quantum dots
Issue Date2005
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, 2005, v. 44 n. 1, p. 93-100 How to Cite?
AbstractWe investigate mesoscopic spin transport through a quantum dot (QD) responded by a rotating and an oscillating magnetic fields. The rotating magnetic field rotates with the angular frequency 0 around the z-axis with the tilt angle , while the time-oscillating magnetic field is located in the z-axis with the angular frequency . The spin flip is caused by the rotating magnetic field, and it is the major source of spin current. The Zeeman effect is contributed by the two field components, and it is important as the magnetic fields are strong. The oscillating magnetic field takes significant role due to the spin-photon pumping effect, and the spin current can be generated by it even as 00 for the tilt angle 0. The peak and valley structure appears with respect to the frequency of oscillating field. The generation of spin current is companying with charge current. Spin current displays quite different appearance between the cases in the absence of source-drain bias (eV=0) and in the presence of source-drain bias (eV0). The symmetric spin current disappears to form asymmetric spin current with a negative valley and a positive plateau. The charge current is mainly determined by the source-drain bias, photon absorption, and spin-flip effect. This system can be employed as an ac charge-spin current generator, or ac charge-spin field effect transistor.
Persistent Identifierhttp://hdl.handle.net/10722/48660
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.accessioned2008-05-22T04:20:32Z-
dc.date.available2008-05-22T04:20:32Z-
dc.date.issued2005en_HK
dc.identifier.citationEuropean Physical Journal B Condensed Matter, 2005, v. 44 n. 1, p. 93-100en_HK
dc.identifier.issn1434-6028en_HK
dc.identifier.urihttp://hdl.handle.net/10722/48660-
dc.description.abstractWe investigate mesoscopic spin transport through a quantum dot (QD) responded by a rotating and an oscillating magnetic fields. The rotating magnetic field rotates with the angular frequency 0 around the z-axis with the tilt angle , while the time-oscillating magnetic field is located in the z-axis with the angular frequency . The spin flip is caused by the rotating magnetic field, and it is the major source of spin current. The Zeeman effect is contributed by the two field components, and it is important as the magnetic fields are strong. The oscillating magnetic field takes significant role due to the spin-photon pumping effect, and the spin current can be generated by it even as 00 for the tilt angle 0. The peak and valley structure appears with respect to the frequency of oscillating field. The generation of spin current is companying with charge current. Spin current displays quite different appearance between the cases in the absence of source-drain bias (eV=0) and in the presence of source-drain bias (eV0). The symmetric spin current disappears to form asymmetric spin current with a negative valley and a positive plateau. The charge current is mainly determined by the source-drain bias, photon absorption, and spin-flip effect. This system can be employed as an ac charge-spin current generator, or ac charge-spin field effect transistor.en_HK
dc.format.extent171238 bytes-
dc.format.extent4247 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
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.subjectNanoelectronic devicesen_HK
dc.subjectElectronic transport in mesoscopic systemsen_HK
dc.subjectMk Spin transport through surfacesen_HK
dc.subjectQuantum dotsen_HK
dc.titleMesoscopic spin-flip transport through a quantum dot system responded by ac magnetic fieldsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1434-6028&volume=44&issue=1&spage=93&epage=100&date=2005&atitle=Mesoscopic+spin-flip+transport+through+a+quantum+dot+system+responded+by+ac+magnetic+fields+en_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/e2005-00103-xen_HK
dc.identifier.scopuseid_2-s2.0-17844410688-
dc.identifier.hkuros98062-
dc.identifier.isiWOS:000232025700011-

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