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Article: Magnetic field effects on quantum-dot spin valves

TitleMagnetic field effects on quantum-dot spin valves
Authors
KeywordsQuantum Dot
Spin Value
Spintronics
Issue Date2009
PublisherChinese Academy of Sciences, Institute of Theoretical Physics. The Journal's web site is located at http://ctp.itp.cn
Citation
Communications In Theoretical Physics, 2009, v. 51 n. 3, p. 555-562 How to Cite?
AbstractWe study the magnetic field effects on the spin-polarized transport of the quantum dot (QD) spin valve in the sequential tunneling regime. A set of generalized master equation is derived. Based on that, we discuss the collinear and noncollinear magnetic field effects, respectively. In the collinear magnetic field case, we find that the Zeeman splitting can induce a negative differential conductance (NDC), which is quite different from the one found in previous studies. It has a critical polarization in the parallel arrangement and will disappear in the antiparallel configuration. In the noncollinear magnetic field case, the current shows two plateaus and their angular dependence is analyzed. Although sometimes the two current plateaus have similar angular dependence, their mechanisms are different. Our formalism is also suitable for calculating the transport in magnetic molecules, in which the spin splitting is induced not by a magnetic field but by the intrinsic magnetization. © 2009 Chinese Physical Society and IOP Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/175158
ISSN
2015 Impact Factor: 0.948
2015 SCImago Journal Rankings: 0.493
References

 

DC FieldValueLanguage
dc.contributor.authorGao, JHen_US
dc.contributor.authorSun, QFen_US
dc.contributor.authorXie, XCen_US
dc.date.accessioned2012-11-26T08:49:28Z-
dc.date.available2012-11-26T08:49:28Z-
dc.date.issued2009en_US
dc.identifier.citationCommunications In Theoretical Physics, 2009, v. 51 n. 3, p. 555-562en_US
dc.identifier.issn0253-6102en_US
dc.identifier.urihttp://hdl.handle.net/10722/175158-
dc.description.abstractWe study the magnetic field effects on the spin-polarized transport of the quantum dot (QD) spin valve in the sequential tunneling regime. A set of generalized master equation is derived. Based on that, we discuss the collinear and noncollinear magnetic field effects, respectively. In the collinear magnetic field case, we find that the Zeeman splitting can induce a negative differential conductance (NDC), which is quite different from the one found in previous studies. It has a critical polarization in the parallel arrangement and will disappear in the antiparallel configuration. In the noncollinear magnetic field case, the current shows two plateaus and their angular dependence is analyzed. Although sometimes the two current plateaus have similar angular dependence, their mechanisms are different. Our formalism is also suitable for calculating the transport in magnetic molecules, in which the spin splitting is induced not by a magnetic field but by the intrinsic magnetization. © 2009 Chinese Physical Society and IOP Publishing Ltd.en_US
dc.languageengen_US
dc.publisherChinese Academy of Sciences, Institute of Theoretical Physics. The Journal's web site is located at http://ctp.itp.cnen_US
dc.relation.ispartofCommunications in Theoretical Physicsen_US
dc.subjectQuantum Doten_US
dc.subjectSpin Valueen_US
dc.subjectSpintronicsen_US
dc.titleMagnetic field effects on quantum-dot spin valvesen_US
dc.typeArticleen_US
dc.identifier.emailGao, JH: jhgao@hku.hken_US
dc.identifier.authorityGao, JH=rp00698en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1088/0253-6102/51/3/35en_US
dc.identifier.scopuseid_2-s2.0-65749115321en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-65749115321&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume51en_US
dc.identifier.issue3en_US
dc.identifier.spage555en_US
dc.identifier.epage562en_US
dc.publisher.placeChinaen_US
dc.identifier.scopusauthoridGao, JH=14021339900en_US
dc.identifier.scopusauthoridSun, QF=34572810700en_US
dc.identifier.scopusauthoridXie, XC=13502915800en_US

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