A perfect match between borophene and aluminium in the AlB3heterostructure with covalent Al-B bonds, multiple Dirac points and a high Fermi velocity

Research output: Contribution to journalResearch articleContributedpeer-review


  • Yalong Jiao - , TUD Dresden University of Technology (Author)
  • Fengxian Ma - , Hebei Normal University (Author)
  • Xiaolei Zhang - , Hebei Normal University (Author)
  • Thomas Heine - , Chair of Theoretical Chemistry, Helmholtz-Zentrum Dresden-Rossendorf, Yonsei University (Author)


By performing a swarm-intelligent global structure search combined with first-principles calculations, a stable two-dimensional (2D) AlB3 heterostructure with directed, covalent Al-B bonds forms due to a nearly perfect lattice match between 2D borophene and the Al(111) surface. The AlB3 heterosheet with the P6mm space group is composed of a planar Al(111) layer and a corrugated borophene layer, where the in-plane coordinates of Al covalently link with the corrugated B atoms. The resulting structure shows a similar interlayer interaction energy to that of the Al(111) surface layer to the bulk and high mechanical and thermal stability, possesses multiple Dirac points in the Brillouin zone with a remarkably high Fermi velocity of 1.09 × 106 m s-1, which is comparable to that of graphene. Detailed analysis of the electronic structure employing the electron localisation function and topological analysis of the electron density confirm the covalent Al-B bond with high electron localisation between the Al and B centres and with only little interatomic charge transfer. The combination of borophene with metal monolayers in 2D heterostructures opens the door to a rich chemistry with potentially unprecedented properties.


Original languageEnglish
Pages (from-to)1016-1022
Number of pages7
JournalChemical science
Issue number4
Publication statusPublished - 28 Jan 2022

External IDs

ORCID /0000-0003-2379-6251/work/105838765


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