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Article: Spin Filter of Graphene Nanoribbon Based Structure

TitleSpin Filter of Graphene Nanoribbon Based Structure
Authors
KeywordsCondensed matter: electrical, magnetic and optical
Condensed matter: structural, mechanical & thermal
Issue Date2010
Citation
Chinese Physics Letters, 2010, v. 27 n. 8, p. 087205 How to Cite?
AbstractSpin-dependent transport properties of the zigzag graphene nano-ribbon (zGNR) based structure Al-zGNR-Al are investigated by ab initio technique where density functional calculation is carried out within the Keldysh non-equilibrium Green's function formalism. The energy band structure of the infinite zigzag ribbon is sensitive to the dangling bonds of carbon atoms on both edge sides. For the three-circle-width zigzag ribbon with one edge monohydrogenated and the other edge dihydrogenated (zGNR(H-H2)), strongly spin-polarized energy bands are found. A spin-down branch is obtained just below the Fermi level while a spin up band appears above it. For the structure Al-zGNR(H-H2)-Al, where three-circle-width and seven-circle-length (3 × 7) zGNR(H-H2) is coupled by two (100) aluminium electrodes, an obvious spin filter property is found as the bias voltage changes. When the length of the sandwiched zGNR(H-H2) ribbon increases, the spin-up current is strongly restrained especially under higher bias voltage.
Persistent Identifierhttp://hdl.handle.net/10722/135356
ISI Accession Number ID
Funding AgencyGrant Number
National Natural Science Foundation of China10947018
Funding Information:

Supported by the National Natural Science Foundation of China under Grant No 10947018.

 

DC FieldValueLanguage
dc.contributor.authorWan, LHen_US
dc.contributor.authorYu, YJen_US
dc.contributor.authorWang, Ben_US
dc.date.accessioned2011-07-27T01:34:08Z-
dc.date.available2011-07-27T01:34:08Z-
dc.date.issued2010en_US
dc.identifier.citationChinese Physics Letters, 2010, v. 27 n. 8, p. 087205en_US
dc.identifier.urihttp://hdl.handle.net/10722/135356-
dc.description.abstractSpin-dependent transport properties of the zigzag graphene nano-ribbon (zGNR) based structure Al-zGNR-Al are investigated by ab initio technique where density functional calculation is carried out within the Keldysh non-equilibrium Green's function formalism. The energy band structure of the infinite zigzag ribbon is sensitive to the dangling bonds of carbon atoms on both edge sides. For the three-circle-width zigzag ribbon with one edge monohydrogenated and the other edge dihydrogenated (zGNR(H-H2)), strongly spin-polarized energy bands are found. A spin-down branch is obtained just below the Fermi level while a spin up band appears above it. For the structure Al-zGNR(H-H2)-Al, where three-circle-width and seven-circle-length (3 × 7) zGNR(H-H2) is coupled by two (100) aluminium electrodes, an obvious spin filter property is found as the bias voltage changes. When the length of the sandwiched zGNR(H-H2) ribbon increases, the spin-up current is strongly restrained especially under higher bias voltage.-
dc.languageengen_US
dc.relation.ispartofChinese Physics Lettersen_US
dc.subjectCondensed matter: electrical, magnetic and optical-
dc.subjectCondensed matter: structural, mechanical & thermal-
dc.titleSpin Filter of Graphene Nanoribbon Based Structureen_US
dc.typeArticleen_US
dc.identifier.emailWang, B: benwb@hku.hken_US
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0256-307X/27/8/087205en_US
dc.identifier.scopuseid_2-s2.0-78649388852-
dc.identifier.hkuros185944en_US
dc.identifier.volume27en_US
dc.identifier.issue8en_US
dc.identifier.spage087205en_US
dc.identifier.epage087205en_US
dc.identifier.isiWOS:000280577200048-

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