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Updated: Jun 26, 2025

Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
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Modulating electronic structure by interlayer spacing and twist on bilayer bismuthene.

Hongfei Zhang1,2, Shuwei Cheng1,2, Yuanping Chen1,2

  • 1School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, People's Republic of China.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|May 10, 2024
PubMed
Summary

By adjusting twist angle and interlayer spacing, researchers can tune the electronic properties of bilayer bismuthene. This study reveals a new method for controlling energy bands in two-dimensional materials.

Keywords:
electronic band structureflat bandtwisted bilayervan-der-Waals material

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Modulating electronic structure is key for advancing two-dimensional (2D) materials.
  • Twist angle offers an unexplored degree of freedom for heterostructure property control.

Purpose of the Study:

  • Investigate the impact of twist angle and interlayer spacing on bilayer bismuthene's electronic properties.
  • Explore novel methods for tailoring the energy band structure of 2D materials.

Main Methods:

  • Computational modeling of bilayer bismuthene.
  • Systematic variation of twist angles and interlayer spacings.
  • Analysis of resulting energy band structures.

Main Results:

  • Distinct energy band patterns observed in bilayer bismuthene.
  • Modulating twist angle and interlayer spacing significantly influences interlayer interactions.
  • Bandgap size closely correlates with interlayer spacing; twist angle affects energy band shape.
  • Synergistic effects between spacing and angle observed, enabling flat band generation.

Conclusions:

  • Interlayer spacing and twist angle are effective parameters for tailoring bilayer bismuthene's energy band structure.
  • Flat bands can be achieved in bilayer bismuthene without specific angle constraints.
  • This approach offers a promising route for designing novel 2D electronic devices.