Semimetallic Two-Dimensional Boron Allotrope with Massless Dirac Fermions
By Xiang‐Feng Zhou, Xiao Dong, Artem R. Oganov, Qiang Zhu, Yongjun Tian, Hui-Tian Wang. 2013
444 citations recorded by the source corpus.
It has been widely accepted that planar boron structures, composed of triangular and hexagonal motifs are the most stable two-dimensional (2D) phases and likely precursors for boron nanostructures. Here we predict, based on an ab initio evolutionary structure search, a novel 2D boron structure with nonzero thickness, which is considerably, by $50\text{ }\text{ }\mathrm{meV}/\mathrm{atom}$, lower in energy than the recently proposed $\ensuremath{\alpha}$-sheet structure and its analogues. In particular, this phase is identified for the first time to have a distorted Dirac cone, after graphene and silicene the third elemental material with massless Dirac fermions. The buckling and coupling between the two sublattices not only enhance the energetic stability, but also are the key factors for the emergence of the distorted Dirac cone.
Subfields: Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/7122b7734c752b107f6ecfd5f96cb5ef64065640
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In Materials Chemistry
- Kostas Kostarelos
- M. Prato
- Francesco Bonaccorso
- A. Bianco
- A. Castellanos-Gómez
- Jonathan N. Coleman
- Andrea C. Ferrari
- Paolo Samorì
Citations in the corpus
- Experimental realization of two-dimensional boron sheets. (2015, background): “Even some 2D structures of boron were predicted to host Dirac fermions recently [22].”
- Borophene as an anode material for Ca, Mg, Na or Li ion storage: A first-principle study (2016, background): “Based on the theoretical predictions these kind of bonds exist in Pmmm 16 borophene structure.”
- Production and processing of graphene and related materials (2020, methodology): “These methods have been adopted for instance to predict 1L materials with no bulk layered counterpart, like SiS [420] novel phases of InP [417] and several 2d allotropes of boron [416, 421], known as borophenes.”