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Build Borophite from Borophenes: A Boron Analogue Graphite.

Meng-Hui Wang1, Wen-Cai Yi2, Hao-Lin Song1

  • 1Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China.

Nano Letters
|March 7, 2024
PubMed
Summary
This summary is machine-generated.

Researchers explored 665 boron bilayers, finding most favor covalent bonds. However, δ5 borophene shows promise for van der Waals (vdW) stacking, potentially creating a boron graphite analogue called "borophite".

Keywords:
boropheneshigh-throughputstabilitiessuperconductivityvan der Waals stacking

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Borophenes are synthetic 2D boron materials, unlike graphite, lacking bulk allotropes and exhibiting covalent bonding.
  • Van der Waals (vdW) stacking is typical for layered materials like graphite, but not inherent to borophenes.

Purpose of the Study:

  • To investigate the potential for bulk-layered boron allotropes via vdW stacking of boron bilayers.
  • To identify boron structures that could mimic graphite's layered structure.

Main Methods:

  • Systematic high-throughput screening of 665 vdW-stacking boron bilayers.
  • Stability analysis of identified boron bilayer structures.
  • Electronic and topological structure analysis of promising candidates.

Main Results:

  • Most boron bilayers showed a preference for covalent bonding, not vdW stacking.
  • δ5 borophene emerged as a stable vdW-stacking candidate.
  • δ5 borophene analogues are metallic and exhibit phonon-mediated superconductivity near 22 K.

Conclusions:

  • The study introduces the concept of "borophite", a potential bulk-layered boron allotrope analogous to graphite.
  • δ5 borophene and its analogues offer a pathway towards designing novel vdW-stacked boron materials with unique electronic properties.