Prediction of a Dirac state in monolayer<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">TiB</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>

Zhang, L. Z.; Wang, Z. F.; Du, Shixuan; Gao, Hongjun; Liu, Feng

doi:10.1103/physrevb.90.161402

Cited by 150 publications

(94 citation statements)

References 41 publications

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“…In Ref. [61], it was proposed that a Dirac point could be observed in monolayer TiB 2 ; however, the Dirac point proposed in this paper could be observed on the surface of a thick slab system rather than a monolayer system.…”

Section: Drumhead Surface Statesmentioning

confidence: 57%

Topological Dirac nodal-net fermions in AlB2 -type TiB2 and ZrB2

Xing

Yue

Song

et al. 2018

Phys. Rev. Materials

118

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Based on first-principles calculations and effective model analysis, a Dirac nodal-net semimetal state is recognized in AlB2-type TiB2 and ZrB2 when spin-orbit coupling (SOC) is ignored. Taking TiB2 as an example, there are several topological excitations in this nodal-net structure including triple point, nexus, and nodal link, which are protected by coexistence of spatial-inversion symmetry and time reversal symmetry. This nodal-net state is remarkably different from that of IrF4, which requires sublattice chiral symmetry. In addition, linearly and quadratically dispersed two-dimensional surface Dirac points are identified as having emerged on the Bterminated and Ti-terminated (001) surfaces of TiB2 respectively, which are analogous to those of monolayer and bilayer graphene. arXiv:1705.00511v2 [cond-mat.mtrl-sci]

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Section: Drumhead Surface Statesmentioning

confidence: 57%

Topological Dirac nodal-net fermions in AlB2 -type TiB2 and ZrB2

Xing

Yue

Song

et al. 2018

Phys. Rev. Materials

118

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“…The Os-C bond length is 2.32 Å. Similar structures based on group-IIIA sheets have been proposed [25][26][27]. Some typical metastable structures can be seen in Supplemental Material [14].…”

mentioning

confidence: 65%

Two-dimensional topological crystalline quantum spin Hall effect in transition metal intercalated compounds

Zhou

Jena

2017

Phys. Rev. B

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“…These stable and experimentally realizable materials provide a platform to verify and study the theoretically predicted unconventional superconductivity of heavily doped 16 graphene. The stabilization strategy can also be applied to other unstable 2D nanomaterials such as h-B sheet [34,35], 1T-MoS 2 [36], planar arsenene [37] and h-GaBi [38].…”

Section: E Stability and Superconductivity Of H-cbmentioning

confidence: 99%

High-temperature superconductivity in heavily N- or B-doped graphene

et al. 2015

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Two-dimensional honeycomb lattice of graphene, if heavily doped with electrons or holes, has been predicted to possess a wealth of fascinating properties including high temperature superconductivity. Although such a material is possible with high concentration of N-(or B-) substitution, its experimental realization has been hindered due to its dynamic instability. Using density functional theory combined with a global structural search and phonon dispersion calculations, we show that an ordered 50% N-(B-) doped graphene can be made energetically and dynamically stable by simultaneous doping carriers and applying biaxial tensile strain; carrier doping moves the system toward aromaticity while tensile strain reduces adverse effects associated with electrostatic interaction. Electron-phonon coupling calculations show that the N-(B-) doped graphene is superconducting with critical temperature reaching above the melting point of nitrogen in the case of 50% N-doped graphene. In addition, the ideal strength of Ndoped graphene is even higher than that of pure graphene.

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Prediction of a Dirac state in monolayerTiB2

Cited by 150 publications

References 41 publications

Topological Dirac nodal-net fermions in AlB2 -type TiB2 and ZrB2

Topological Dirac nodal-net fermions in AlB2 -type TiB2 and ZrB2

Two-dimensional topological crystalline quantum spin Hall effect in transition metal intercalated compounds

High-temperature superconductivity in heavily N- or B-doped graphene

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