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Article: Spin current carried by magnons

TitleSpin current carried by magnons
Authors
KeywordsPhysics
Issue Date2004
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B (Condensed Matter and Materials Physics), 2004, v. 69 n. 17, p. 174403:1-5 How to Cite?
AbstractA spin current is usually carried by electrons and generated due to the imbalance of up-spin and down-spin. Here we investigate another type of spin current, which is carried by magnons. Using nonequilibrium Green's-function technique, we have derived a Landauer-Büttiker-type formula for spin current transport. The spin current satisfies conservation condition and can be expressed in terms of the magnon Green's functions of the mesoscopic ferromagnetic isolating system. As an application of this theory, we study the magnon transport properties of a two-level magnon quantum dot in the presence of the magnon-magnon scattering. By solving the self-consistent equations, we obtain the nonlinear spin current as a function of the magnetochemical potential. The spin current generated by using a parametric quantum pumping mechanism is also discussed.
Persistent Identifierhttp://hdl.handle.net/10722/43423
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, Ben_HK
dc.contributor.authorWang, Jen_HK
dc.contributor.authorWang, Jen_HK
dc.contributor.authorXing, DYen_HK
dc.date.accessioned2007-03-23T04:45:25Z-
dc.date.available2007-03-23T04:45:25Z-
dc.date.issued2004en_HK
dc.identifier.citationPhysical Review B (Condensed Matter and Materials Physics), 2004, v. 69 n. 17, p. 174403:1-5en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43423-
dc.description.abstractA spin current is usually carried by electrons and generated due to the imbalance of up-spin and down-spin. Here we investigate another type of spin current, which is carried by magnons. Using nonequilibrium Green's-function technique, we have derived a Landauer-Büttiker-type formula for spin current transport. The spin current satisfies conservation condition and can be expressed in terms of the magnon Green's functions of the mesoscopic ferromagnetic isolating system. As an application of this theory, we study the magnon transport properties of a two-level magnon quantum dot in the presence of the magnon-magnon scattering. By solving the self-consistent equations, we obtain the nonlinear spin current as a function of the magnetochemical potential. The spin current generated by using a parametric quantum pumping mechanism is also discussed.en_HK
dc.format.extent81514 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.titleSpin current carried by magnonsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=69&issue=17&spage=174403:1&epage=5&date=2004&atitle=Spin+current+carried+by+magnonsen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.69.174403en_HK
dc.identifier.scopuseid_2-s2.0-37649026491-
dc.identifier.hkuros88903-
dc.identifier.isiWOS:000221907200036-

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