Boron and nitrogen doping in graphene antidot lattices

Brun, Søren Jacob; Pereira, Vitor M.; Pedersen, Thomas Garm

doi:10.1103/physrevb.93.245420

Cited by 8 publications

(11 citation statements)

References 67 publications

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“…A similar effect can be induced with chemical doping, namely, adding one N atom in substitution of a C atom. The effects of chemical substitution have been extensively studied in graphene [72][73][74][75][76][77][78][79][80][81], including twisted bilayers [53,82]. Figure 5 shows the effect on the bands structure of one N atom in one of the surface layers.…”

Section: Impact Of Chemical Dopingmentioning

confidence: 99%

Electrical band flattening, valley flux, and superconductivity in twisted trilayer graphene

López-Bezanilla

Lado

2020

Phys. Rev. Research

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Twisted graphene multilayers have been demonstrated to yield a versatile playground to engineer controllable electronic states. Here, by combining first-principles calculations and low-energy models, we demonstrate that twisted graphene trilayers provide a tunable system where Van Hove singularities can be controlled electrically. In particular, it is shown that besides the band flattening, bulk valley currents appear, which can be quenched by local chemical dopants. We finally show that in the presence of electronic interactions, a nonuniform superfluid density emerges whose nonuniformity gives rise to spectroscopic signatures in dispersive higher-energy bands. Our results put forward twisted trilayers as a tunable van der Waals heterostructure displaying electrically controllable flat bands and bulk valley currents.

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Section: Impact Of Chemical Dopingmentioning

confidence: 99%

Electrical band flattening, valley flux, and superconductivity in twisted trilayer graphene

López-Bezanilla

Lado

2020

Phys. Rev. Research

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“…In the physics literature, this type of spatially localised mass terms in the Dirac equation are used to model obstacles for the effective particles [1,18,21]. In addition, the limiting operator H Ω is used to model particles confined to Ω, as it is the case for quantum dots [16] or for a periodically perforated sheet of graphene [12,11]. It is therefore desirable to estimate the speed of convergence of H m to H Ω .…”

Section: Introductionmentioning

confidence: 99%

Resolvent Convergence to Dirac Operators on Planar Domains

Barbaroux

Cornean

Treust

et al. 2019

Ann. Henri Poincaré

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Consider a Dirac operator defined on the whole plane with a mass term of size m supported outside a domain Ω. We give a simple proof for the norm resolvent convergence, as m goes to infinity, of this operator to a Dirac operator defined on Ω with infinite mass boundary conditions. The result is valid for bounded and unbounded domains and gives estimates on the speed of convergence. Moreover, the method easily extends when adding external matrix-valued potentials.

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“…In particular, nitrogen has attracted much attention as the most common dopant element because it is similar in size to carbon and contains five valence bonds with carbon atoms 15–17 . Therefore, it can potentially be used for various applications 18–20 .…”

Section: Introductionmentioning

confidence: 99%

“…The introduction of heteroatoms (e.g., nitrogen or boron) into CNs, which do not exhibit a band gap by themselves, has been important for tailoring their electronic properties and chemical reactivity by opening the band gap and modulating conducting types 10 – 14 . In particular, nitrogen has attracted much attention as the most common dopant element because it is similar in size to carbon and contains five valence bonds with carbon atoms 15 – 17 . Therefore, it can potentially be used for various applications 18 – 20 .…”

Section: Introductionmentioning

confidence: 99%

The solution plasma process for heteroatom-carbon nanosheets: the role of precursors

Hyun

Saito

2017

Sci Rep

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The solution plasma process (SPP), known as non-equilibrium cold plasma at atmospheric pressure and room temperature, was used to investigate the synthesis of nitrogen-carbon nasnosheets (NCNs). To verify the effect of elementary composition and structure of N-methyl-2-pyrrolidone (NMP), various precursors were used in the SPP to synthesize NCNs via the bottom-up synthesis method for the first time. The NCNs were analyzed by transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. Among the various precursors, SPP of 2-pyrrolidone was demonstrated to facilitate the formation of highly ordered NCNs. On the other hand, the SPP with cyclopentanone, cyclohexanone and pyrrole did not lead to the formation of carbon nanosheets. The results of this study would uncover new parameter fields for the growth of heteroatom-carbon nanosheets using this synthesis system. In addition, the study is expected to contribute toward research in improving the large-area growth and quality of two-dimensional nanostructures, such as heteroatom-carbon nanosheets or graphene, for various applications in other synthesis methods.Among various carbon nanomaterials, two-dimensional (2D) carbon allotropes such as carbon nanosheets (CNs), which are composed of few-to multi-layer graphene sheets 1, 2 , have emerged as a promising material for the development of lithium-ion batteries 3 , supercapacitors 4 , organic solar cells 5 , sensitive gas-detection materials 6 , field emission materials 7 , carbon dioxide adsorbents 8 , and fuel cells 9 .The introduction of heteroatoms (e.g., nitrogen or boron) into CNs, which do not exhibit a band gap by themselves, has been important for tailoring their electronic properties and chemical reactivity by opening the band gap and modulating conducting types 10-14 . In particular, nitrogen has attracted much attention as the most common dopant element because it is similar in size to carbon and contains five valence bonds with carbon atoms [15][16][17] . Therefore, it can potentially be used for various applications [18][19][20] .Recently, the solution plasma process (SPP), known as non-equilibrium cold plasma at atmospheric pressure and room temperature 21 , was used to synthesize CNs via the bottom-up synthesis method for the first time 22 . Nitrogen-carbon nasnosheets (NCNs), composed of multi-layer graphene (MLG) with turbostratic stacking, were synthesized by the SPP at a high-repetition frequency with N-methyl-2-pyrrolidone (NMP). The findings demonstrated the advantages of the SPP, such as a short synthesis time, simple experimental apparatus, no impurity issues, and the ability to operate at room temperature, when compared with nanosheets prepared by conventional methods 22,23 . Before the synthesis of NCNs, various organic precursor solutions have been used in the SPP to produce carbon nanomaterials for use in carbon nanomaterial-based electrocatalysts such as fuel cells and lithium-air batteries [24][25][26][27] . Although these syntheses were under the same or simi...

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Boron and nitrogen doping in graphene antidot lattices

Cited by 8 publications

References 67 publications

Electrical band flattening, valley flux, and superconductivity in twisted trilayer graphene

Electrical band flattening, valley flux, and superconductivity in twisted trilayer graphene

Resolvent Convergence to Dirac Operators on Planar Domains

The solution plasma process for heteroatom-carbon nanosheets: the role of precursors

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