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Updated: Jul 31, 2025
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Enhanced Superconductivity and Rashba Effect in a Buckled Plumbene-Au Kagome Superstructure
Wan-Hsin Chen1, Chin-Hsuan Chen2, Guan-Hao Chen1,3,4
1Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu, 300, Taiwan.
Summary
A novel buckled plumbene-gold Kagome superstructure enhances superconductivity. This material exhibits a higher superconducting critical temperature (Tc) than both monolayer and bulk lead, driven by electron-phonon coupling.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Surface Science
Background:
- Plumbene, a graphene analog, is theorized to have strong spin-orbit coupling, potentially enhancing superconductivity.
- Superconducting critical temperature (Tc) is a key property influenced by material structure and electronic interactions.
Purpose of the Study:
- To investigate the superconducting properties of a buckled plumbene-gold Kagome superstructure.
- To determine if this superstructure enhances the superconducting critical temperature (Tc) compared to lead.
- To elucidate the mechanisms behind superconductivity in this novel material.
Main Methods:
- Fabrication of a buckled plumbene-Au Kagome superstructure by depositing gold on Pb(111).
- Temperature-dependent scanning tunneling microscopy/spectroscopy (STM/STS) to monitor the superconducting gap.
- Angle-resolved photoemission spectroscopy (ARPES) combined with density functional theory (DFT) calculations.
Main Results:
- The buckled plumbene-Au Kagome superstructure exhibits an enhanced superconducting critical temperature (Tc).
- The observed Tc is higher than that of monolayer lead and bulk lead.
- ARPES and DFT confirm the presence of Au-intercalated low-buckled plumbene and reveal electron-phonon coupling enhancement.
Conclusions:
- The buckled plumbene-Au Kagome superstructure significantly enhances superconducting Tc.
- The enhanced superconductivity is attributed to electron-phonon coupling.
- This superstructure triggers novel properties in plumbene, including enhanced Rashba effect.
Keywords:
Rashba effectangle-resolved photoemission spectroscopybuckled plumbenedensity functional theoryelectron-phonon couplingscanning tunneling microscopysuperconductivityMore Related Videos
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