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Article: Magnetoconductance in quantum waveguides with inhomogeneous magnetic fields

TitleMagnetoconductance in quantum waveguides with inhomogeneous magnetic fields
Authors
KeywordsPhysics engineering
Issue Date1999
PublisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp
Citation
Journal of Applied Physics, 1999, v. 85 n. 3, p. 1591-1596 How to Cite?
AbstractWe discuss the properties of magnetotransport of electrons in quantum waveguides (QWs) in the presence of laterally inhomogeneous magnetic fields perpendicular to the QW plane. The inhomogeneous magnetic fields can be produced by the deposition, on top of a heterostructure, of ferromagnetic stripes with magnetization perpendicular and parallel to the two-dimensional electron gas. It is found that the magnetoconductance in such a device as a function of the Fermi energy of electrons exhibits square-wave-like oscillations that are strongly dependent on the geometrical arrangement and magnetic configurations in the QWs. Different dispersions can be observed. From analyses of the magnetic effective potential, the dispersion relations can be understood well. In some magnetic modulations, the energy spectrum exhibits a bump superimposed upon every bulk Landau level. It is these oscillatory structures in dispersions that lead to square-wave-like shaped modulation in magnetoconductance, which may serve as an energy filter of electrons. ©1999 American Institute of Physics.
Persistent Identifierhttp://hdl.handle.net/10722/42452
ISSN
2015 Impact Factor: 2.101
2015 SCImago Journal Rankings: 0.603
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorGu, BYen_HK
dc.contributor.authorWang, Jen_HK
dc.date.accessioned2007-01-29T08:50:20Z-
dc.date.available2007-01-29T08:50:20Z-
dc.date.issued1999en_HK
dc.identifier.citationJournal of Applied Physics, 1999, v. 85 n. 3, p. 1591-1596en_HK
dc.identifier.issn0021-8979en_HK
dc.identifier.urihttp://hdl.handle.net/10722/42452-
dc.description.abstractWe discuss the properties of magnetotransport of electrons in quantum waveguides (QWs) in the presence of laterally inhomogeneous magnetic fields perpendicular to the QW plane. The inhomogeneous magnetic fields can be produced by the deposition, on top of a heterostructure, of ferromagnetic stripes with magnetization perpendicular and parallel to the two-dimensional electron gas. It is found that the magnetoconductance in such a device as a function of the Fermi energy of electrons exhibits square-wave-like oscillations that are strongly dependent on the geometrical arrangement and magnetic configurations in the QWs. Different dispersions can be observed. From analyses of the magnetic effective potential, the dispersion relations can be understood well. In some magnetic modulations, the energy spectrum exhibits a bump superimposed upon every bulk Landau level. It is these oscillatory structures in dispersions that lead to square-wave-like shaped modulation in magnetoconductance, which may serve as an energy filter of electrons. ©1999 American Institute of Physics.en_HK
dc.format.extent131065 bytes-
dc.format.extent27648 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.languageengen_HK
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jspen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectPhysics engineeringen_HK
dc.titleMagnetoconductance in quantum waveguides with inhomogeneous magnetic fieldsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0021-8979&volume=85&issue=3&spage=1591&epage=1596&date=1999&atitle=Magnetoconductance+in+quantum+waveguides+with+inhomogeneous+magnetic+fieldsen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1063/1.369291en_HK
dc.identifier.scopuseid_2-s2.0-0033072747-
dc.identifier.hkuros47566-
dc.identifier.isiWOS:000078137100044-

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