Topological carbon materials: A new perspective

The past decades have witnessed a rapid expansion in investigations of twodimensional (2D) monoelemental materials (Xenes), which are promising materials in various fields, including applications in optoelectronic devices, biomedicine, catalysis, and energy storage. Apart from graphene and phosphorene, recently emerging 2D Xenes, specifically graphdiyne, borophene, arsenene, antimonene, bismuthene, and tellurene, have attracted considerable interest due to their unique optical, electrical, and catalytic properties, endowing them a broader range of intriguing applications. In this review, the structures and properties of these emerging Xenes are summarized based on theoretical and experimental results. The synthetic approaches for their fabrication, mainly bottom-up and top-down, are presented. Surface modification strategies are also shown. The wide applications of these emerging Xenes in nonlinear optical devices, optoelectronics, catalysis, biomedicine, and energy application are further discussed. Finally, this review concludes with an assessment of the current status, a description of existing scientific and application challenges, and a discussion of possible directions to advance this fertile field.

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Section: Structure Properties and Theory Of Xenes And Their Heterojun...mentioning

confidence: 99%

Chemistry, Functionalization, and Applications of Recent Monoelemental Two-Dimensional Materials and Their Heterostructures

et al. 2021

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“…Recently, topological phonons have also attracted much attention [233][234][235][236][237][238], because of their potential implications in electronphonon coupling, dynamic instability [239], and phonon diodes [235]. The spin-orbit coupling (SOC) of carbon atom is very small, and carbon materials are well known as the candidates of topological semimetal (metal) [240], which may have a family of ideal candidates of topological phonons. However, it is not easy to find a realistic carbon material featuring topological phonons, because it requires the topological surface states of phonons that should be well separated from the bulk phonon spectrum.…”

Section: F Topological Phononsmentioning

confidence: 99%

T-carbon: experiments, properties, derivatives and potential applications

Yi,

Zhang,

Liao

et al. 2021

Preprint

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“…In the past decades, the ever-expanding library of carbon allotropes has become more and more colorful. Naturally, the structural diversity gives rise to a broad range of exotic properties [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] , such as semiconductivity [8][9][10][11] , metallicity [12][13][14][15] , superhardness [16][17][18][19][20][21] , and topological states [22][23][24][25] , which are anticipated to realize the desirable applications in microelectronic devices, Li/Na/K ion batteries, industrial cutting, and topological quantum computation, respectively.…”

Section: Introductionmentioning

confidence: 99%

Tetragonal Mexican-Hat Dispersion and Switchable Half-Metal State with Multiple Anisotropic Weyl Fermions in Penta-Graphene

Zhao

Jia

Shi

et al. 2022

Preprint

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Due to the paired valence electrons configuration, all known 2D carbon allotropes are intrinsically nonmagnetic. Based on the reported 2D carbon structure database and first-principles calculations, herein we demonstrate that inherent ferromagnetism can be obtained in the prominent allotrope, penta-graphene, which has a unique Mexican-hat valence band edge, giving rise to van Hove singularities and electronic instability. Induced by modest hole-doping that is achievable in electrolyte gate, the semiconducting penta-graphene can be transformed into different ferromagnetic half-metals with room-temperature stability and switchable spin directions. In particular, multiple anisotropic Weyl states, including type-I and type-II Weyl cones and hybrid quasi Weyl nodal loop, can be found in a sizable energy window of spin-down half-metal under proper strains. These findings not only identify a promising carbon allotrope to obtain the inherent magnetism for carbon-based spintronic devices, but highlight the possibility to realize different Weyl states by combining the electronic and mechanical means as well.

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Topological carbon materials: A new perspective

Cited by 53 publications

References 483 publications

Chemistry, Functionalization, and Applications of Recent Monoelemental Two-Dimensional Materials and Their Heterostructures

Chemistry, Functionalization, and Applications of Recent Monoelemental Two-Dimensional Materials and Their Heterostructures

T-carbon: experiments, properties, derivatives and potential applications

Tetragonal Mexican-Hat Dispersion and Switchable Half-Metal State with Multiple Anisotropic Weyl Fermions in Penta-Graphene

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