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Related Experiment Videos

Spindle nodal chain in three-dimensional α' boron.

Yan Gao1, Yuee Xie, Yuanping Chen

  • 1School of Physics and Optoelectronics, Xiangtan University, Xiangtan, 411105, Hunan, China. chenyp@xtu.edu.cn.

Physical Chemistry Chemical Physics : PCCP
|September 6, 2018
PubMed
Summary

Researchers discovered a stable 3D boron structure, 3D-α' boron, as a nodal-chain semimetal. This quantum material features a novel spindle nodal chain and offers new possibilities for topological materials.

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Area of Science:

  • Quantum materials science
  • Condensed matter physics
  • Materials chemistry

Background:

  • Topological metals/semimetals (TMs) are a significant area of quantum materials research.
  • While 2D boron sheets have been explored as Dirac materials, 3D topological boron structures remain undiscovered.

Purpose of the Study:

  • To investigate the potential of 3D boron structures as topological materials.
  • To identify and characterize novel topological phases in boron allotropes.

Main Methods:

  • Systematic first-principles computations were employed.
  • Electronic band structures and chemical bonding were analyzed.

Main Results:

  • A stable 3D boron allotrope, 3D-α' boron, was identified as a nodal-chain semimetal.

Related Experiment Videos

  • This material exhibits a novel spindle nodal chain formed by interconnected nodal lines and rings in momentum space.
  • The constituent 2D wiggle α' boron sheets were also found to be nodal-ring semimetals.

    • Conclusions:

    • 3D-α' boron represents the first discovered 3D topological boron material.
    • The topological properties are linked to π bonding between boron atoms, distinct from carbon allotropes.
    • This discovery opens avenues for exploring new 3D topological quantum materials based on boron.