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Anisotropic Superconductivity in Bilayer Kagome Borophene
Haoxuan Zhang1,2, Qian Gao1, Xingxing Li2
1School of Physics, Nankai University, Tianjin, 300071, China.
Small Methods
|March 26, 2025
Summary
Bilayer Kagome borophene exhibits superconductivity with a high critical temperature (Tc) due to strong electron-phonon coupling. This discovery highlights borophene
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- Boron's unique electron configuration enables diverse allotropes with potential for superconductivity.
- Borophene, a 2D allotrope of boron, is a promising material for novel electronic applications.
Purpose of the Study:
- Investigate superconductivity in bilayer Kagome borophene (BK-borophene).
- Determine the critical temperature (Tc) and underlying mechanisms of superconductivity in BK-borophene.
Main Methods:
- First-principles calculations.
- Anisotropic Migdal-Eliashberg equations and McMillan-Allen-Dynes formula.
Main Results:
- BK-borophene is an anisotropic superconductor with strong electron-phonon coupling (EPC).
- Predicted critical temperature (Tc) ranges from approximately 17.4–35.0 K.
- Superconductivity arises from strong EPC between Fermi level electrons and specific phonon modes (A2u, Eg).
- Anisotropic EPC is linked to Dirac-like and flat bands, enhanced by van Hove singularities (VHS) and higher-order van Hove singularities (HOVHS).
Conclusions:
- BK-borophene demonstrates significant potential for superconductivity applications.
- The presence of VHS and HOVHS near the Fermi level enhances EPC and Tc.
- This research advances understanding of boron-based materials and novel superconductors.
Keywords:
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