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Journal of Materials Science
Erschienen in: Journal of Materials Science 7/2019

19.12.2018 | Computation and theory

Multistate magnetoresistance in zigzag-edge trigonal graphene magnetic junctions

verfasst von: Guangmeng He, Shuai Qiu, Yangjun Cui, Cuiju Yu, Yuanyuan Miao, Guangping Zhang, Junfeng Ren, Chuan-Kui Wang, Guichao Hu

Erschienen in: Journal of Materials Science | Ausgabe 7/2019

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Abstract

Using density functional theory combined with nonequilibrium Green’s function method, spin-dependent transport through a zigzag-edge trigonal graphene molecule coupled with two ferromagnets was investigated. The results reveal that due to the intrinsic magnetism of the central graphene nanoflake, four spin configurations of the device can be achieved. By calculating the current–voltage characteristic, a three-state magnetoresistance effect is obtained companied with a large spin filtering efficiency. The intrinsic mechanism is explored as different shifts of the spin-split frontier molecular orbitals depending on the spin configurations of the device. This work indicates an intriguing prospect of graphene nanoflakes in designing novel spintronic devices, such as multistate magnetoresistance devices.
Vorheriger Artikel Quantifying the role of interface atomic structure in the compressive response of Ti2AlN/TiAl composite using MD simulations
Nächster Artikel Ab initio atomistic thermodynamical study of oxygen desorption and nitrogen adsorption on surfaces

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Metadaten
Titel
Multistate magnetoresistance in zigzag-edge trigonal graphene magnetic junctions
verfasst von
Guangmeng He
Shuai Qiu
Yangjun Cui
Cuiju Yu
Yuanyuan Miao
Guangping Zhang
Junfeng Ren
Chuan-Kui Wang
Guichao Hu
Publikationsdatum
19.12.2018
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 7/2019
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-03246-1

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