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Nearly perfect spin filter and spin logic gate based on a porphyrin/graphene hybrid material

Abstract

Though a lot of theoretical works designed perfect spin filters using inorganic/organic/organometallic materials, their fabrication methods are not experimentally feasible. This dilemma would be solved by a recent experiment, where porphyrins are covalently coupled to graphene edges in a precise manner (Nat. Chem., 2017, 9, 33-38). In particular, experimental results confirmed that intrinsic features of porphyrins for metallation are preserved after the dehydrogenative coupling to graphene edges, paving the way for realizing synthesizable spintronic devices. Inspired by this work, we report new M-porphyrin/graphene (M = Cr, Mn, Fe, and Co) hybrid systems with tunable functionalities on the basis of nonequilibrium Green’s functions in combination with density-function theory. The Mn-porphyrin/graphene hybrid system exhibits extremely high spin polarization coefficient in parallel magnetic configuration. Our results also confirm that the magnetic configuration plays an important role in realizing a high-performance spin filter. The interesting spin transport properties in the parallel and antiparallel magnetic configurations also make the hybrid system a suitable candidate for realizing the AND logic operation.

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Publication details

The article was received on 19 Nov 2017, accepted on 03 Jan 2018 and first published on 05 Jan 2018


Article type: Paper
DOI: 10.1039/C7CP07795E
Citation: Phys. Chem. Chem. Phys., 2018, Accepted Manuscript
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    Nearly perfect spin filter and spin logic gate based on a porphyrin/graphene hybrid material

    J. Zeng and K. Chen, Phys. Chem. Chem. Phys., 2018, Accepted Manuscript , DOI: 10.1039/C7CP07795E

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