Interaction of two symmetric monovacancy defects in graphene

Wang, Xu; Zhang, Lizhi; Li, Huang; Que, Yande; Wang, Yeliang; Lin, Xiao; Du, Shixuan

doi:10.1088/1674-1056/28/4/046801

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…All the blue dash circles indicated in the above pictures are defects found on the surface of graphene which may form to release the surface stress due to lattice mismatch. [16,48]…”

Section: Graphene Self-assembly On Cu(111) Via Tp Moleculesmentioning

confidence: 99%

Triphenylene adsorption on Cu(111) and relevant graphene self-assembly*

et al. 2020

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Investigations on adsorption behavior of triphenylene (TP) and subsequent graphene self-assembly on Cu(111) were carried out mainly by using scanning tunneling microscopy (STM). At monolayer coverage, TP molecules formed a long-range ordered adsorption structure on Cu(111) with an uniform orientation. Graphene self-assembly on the Cu(111) substrate with TP molecules as precursor was achieved by annealing the sample, and a large-scale graphene overlayer was successfully captured after the sample annealing up to 1000 K. Three different Moiré patterns generated from relative rotational disorders between the graphene overlayer and the Cu(111) substrate were observed, one with 4° rotation between the graphene overlayer and the Cu(111) substrate with a periodicity of 2.93 nm, another with 7° rotation and 2.15 nm of the size of the Moiré supercell, and the third with 10° rotation with a periodicity of 1.35 nm.

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“…All the blue dash circles indicated in the above pictures are defects found on the surface of graphene which may form to release the surface stress due to lattice mismatch. [16,48]…”

Section: Graphene Self-assembly On Cu(111) Via Tp Moleculesmentioning

confidence: 99%

Triphenylene adsorption on Cu(111) and relevant graphene self-assembly*

et al. 2020

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Topological-Defect-Induced Superstructures on Graphite Surface

Ruan¹,

Hao²,

Zhang³

et al. 2021

Chinese Phys. Lett.

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Topological defects in graphene induce structural and electronic modulations. Knowing exact nature of broken-symmetry states around the individual atomic defects of graphene is very important for understanding the electronic properties of this material. We investigate structural dependence on localized electronic states in the vicinity of topological defects on a highly oriented pyrolytic graphite (HOPG) surface, using scanning tunneling microscopy and spectroscopy. Several inherent topological defects on the HOPG surface and the local density of states surrounding them are explored, visualized as scattering wave-related ( 3 × 3 ) R30° superstructures and honeycomb superstructures. In addition, the superstructures observed near the grain boundary have a much higher decay length at specific sites than that reported previously, indicating far greater electron scattering on the quasi-periodic grain boundary.

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Non-Hermitian impurities in Dirac systems

Sukhachov

Balatsky

2020

Phys. Rev. Research

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Quasiparticle states in Dirac systems with complex impurity potentials are investigated. It is shown that an impurity site with loss leads to a nontrivial distribution of the local density of states (LDOS). While the real part of defect potential induces a well-pronounced peak in the density of states (DOS), the DOS is either weakly enhanced at small frequencies or even forms a peak at the zero frequency for a lattice in the case of non-Hermitian impurity. As for the spatial distribution of the LDOS, it is enhanced in the vicinity of impurity but shows a dip at a defect itself when the potential is sufficiently strong. The results for a two-dimensional hexagonal lattice demonstrate the characteristic trigonal-shaped profile for the LDOS. The latter acquires a double-trigonal pattern in the case of two defects placed at neighboring sites. The effects of non-Hermitian impurities could be tested both in photonic lattices and certain condensed matter setups. * pavlo.sukhachov@su.se † avb@nordita.org

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Interaction of two symmetric monovacancy defects in graphene

Cited by 3 publications

References 28 publications

Triphenylene adsorption on Cu(111) and relevant graphene self-assembly*

Triphenylene adsorption on Cu(111) and relevant graphene self-assembly*

Topological-Defect-Induced Superstructures on Graphite Surface

Non-Hermitian impurities in Dirac systems

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