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Updated: Jun 22, 2025
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High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
Published on: October 31, 2019
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Electronic phase transition in bilayer P6mmm borophene
Nguyen N Hieu1,2, Huynh V Phuc3, Bui D Hoi4
1Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam.
Physical Chemistry Chemical Physics : PCCP
|July 1, 2024
Summary
Bilayer borophene transitions from metallic to semiconducting or semimetallic states with electric fields and excitonic effects. Doping induces massive Dirac-like bands, ultimately leading to a semiconducting phase with potential optoelectronic applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Bilayer borophene exhibits unique electronic properties due to its 2D structure.
- Understanding phase transitions is crucial for designing novel electronic devices.
Purpose of the Study:
- Investigate electronic phase transitions in bilayer borophene.
- Analyze the impact of electric fields, excitonic effects, and doping.
- Explore changes in band structure and density of states.
Main Methods:
- Tight-binding model
- Green's function technique
- Computational simulation of electronic properties
Main Results:
- Pristine borophene is metallic with Dirac cones and a nodal line.
- Electric fields induce a semiconducting state.
- Combined electric fields and excitonic effects lead to a semimetallic state.
- Doping introduces massive Dirac-like bands, resulting in a semiconducting phase.
Conclusions:
- Bilayer borophene's electronic phase is tunable via external stimuli.
- The material shows potential for optoelectronic applications due to its controllable electronic properties.
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