Migration and Localization of Metal Atoms on Strained Graphene

Cretu, Ovidiu; Krasheninnikov, Arkady V.; Rodríguez–Manzo, Julio A.; Sun, Litao; Nieminen, Risto M.; Banhart, Florian

doi:10.1103/physrevlett.105.196102

Cited by 326 publications

(270 citation statements)

References 30 publications

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“…It has been found that the strain field around such a defect leads to an attractive interaction between the defect and a metal atom migrating on the surface over a scale of 1Ϫ2 nm. 55 This is shown in Figure 5 where a W atom jumps forth and back between two defective sites on graphene that both attract the W atom. A biaxial strain of 1% in the graphene lattice increases the adsorption energy for transition metal adatoms by 0.06Ϫ0.16 eV, depending on the metal species and the adsorption site.…”

Section: Defect Typesmentioning

confidence: 98%

“…Intriguing magnetic properties have been reported for many TM impurities. 69 The strong bonding (e.g., 8.6 or 8.9 eV for a tungsten atom trapped in a single or double vacancy, respectively, 55 ) shows that such defect complexes are stable, and the metal atoms cannot be removed thermally or by irradiation with sub-MeV electrons. Topology of Defective Graphene.…”

Section: Defect Typesmentioning

confidence: 99%

“…5,117 Reconstructed defects, however, could be more attractive because the coherence of the graphene lattice is preserved and the foreign dopant atoms are nevertheless firmly attached. 55 Doping by substitutional impurities is quite straightforward if B atoms (p-doping) or N atoms (n-doping) are used. However, these substitutional dopants lead to resonant scattering effects 118 that strongly depend on the distribution of the dopants and on the geometry of the graphene ribbons.…”

Section: Properties Of Defective Graphenementioning

confidence: 99%

See 2 more Smart Citations

Structural Defects in Graphene

2010

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Graphene is one of the most promising materials in nanotechnology. The electronic and mechanical properties of graphene samples with high perfection of the atomic lattice are outstanding, but structural defects, which may appear during growth or processing, deteriorate the performance of graphenebased devices. However, deviations from perfection can be useful in some applications, as they make it possible to tailor the local properties of graphene and to achieve new functionalities. In this article, the present knowledge about point and line defects in graphene are reviewed. Particular emphasis is put on the unique ability of graphene to reconstruct its lattice around intrinsic defects, leading to interesting effects and potential applications. Extrinsic defects such as foreign atoms which are of equally high importance for designing graphene-based devices with dedicated properties are also discussed.

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Section: Defect Typesmentioning

confidence: 98%

Section: Defect Typesmentioning

confidence: 99%

Section: Properties Of Defective Graphenementioning

confidence: 99%

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Structural Defects in Graphene

2010

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“…Reconstructed defects without dangling bonds, such as SW defects and divacancies, have the possibility of increasing local reactivity [282] due to the locally changed density of -electrons [280,283]. It is evidenced from experiments that metal atoms may be trapped in the reconstructed vacancies [284]. Substitutional non-carbon atoms embedded in the graphitic lattice, such as nitrogen and boron dopants, possess more or less valence electrons than that of carbon atoms, and thus increase the surface reactivity [285].…”

Section: Disorders In Graphene Structurementioning

confidence: 99%

Structure of graphene and its disorders: a review

Gao

Lee

et al. 2018

Science and Technology of Advanced Materials

495

187

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Monolayer graphene exhibits extraordinary properties owing to the unique, regular arrangement of atoms in it. However, graphene is usually modified for specific applications, which introduces disorder. This article presents details of graphene structure, including sp2 hybridization, critical parameters of the unit cell, formation of σ and π bonds, electronic band structure, edge orientations, and the number and stacking order of graphene layers. We also discuss topics related to the creation and configuration of disorders in graphene, such as corrugations, topological defects, vacancies, adatoms and sp3-defects. The effects of these disorders on the electrical, thermal, chemical and mechanical properties of graphene are analyzed subsequently. Finally, we review previous work on the modulation of structural defects in graphene for specific applications.

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“…Recently, graphene has gathered tremendous attention due to its unique electronic and mechanical properties for nanoscale electronics 5 . As a candidate material for spintronic devices, transition-metal-atom-decorated graphene (denoted as TM-graphene hereafter) has been studied extensively in theory 6-9 and experiment [10][11][12][13][14][15] , manifesting some remarkable electronic and magnetic behaviors. Thus, developing a novel method to tune the magnetism of TM-graphene system is quite urgent for future spintronics applications.…”

Section: Introductionmentioning

confidence: 99%

Strain control of magnetism in graphene decorated by transition-metal atoms

Huang

Wei

2011

Phys. Rev. B

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We report a strain-controlled tuning of magnetism in transition-metal-atom-decorated graphene. Our first-principles calculations demonstrate that strain can lead to a sudden change in the magnetic configuration of a transition metal (TM) adatom and the local atomic structure in the surrounding graphene layer. A strong spin-dependent hybridization between TM d and graphene π orbital states, derived from the orbital selection rule of the local lattice symmetry, is responsible for the determination of the local electronic and magnetic structure. Our results indicate that the strain can be an effective way to control the magnetism of atomic-scale nanostructures, where the reliable control of their magnetic states is a key step for the future spintronic applications.

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Migration and Localization of Metal Atoms on Strained Graphene

Cited by 326 publications

References 30 publications

Structural Defects in Graphene

Structural Defects in Graphene

Structure of graphene and its disorders: a review

Strain control of magnetism in graphene decorated by transition-metal atoms

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