Enhanced Superconductivity and Rashba Effect in a Buckled Plumbene-Au Kagome Superstructure

Wan Hsin Chen, Chin Hsuan Chen, Guan Hao Chen, Wei Chuan Chen, Fu Xiang Rikudo Chen, Pei Jung Chen, Chun Kai Ku, Chang Tsan Lee, Naoya Kawakami, Jia Ying Li, Iwao Matsuda, Wen Hao Chang, Juhn Jong Lin, Chien Te Wu, Chung Yu Mou, Horng Tay Jeng*, Shu Jung Tang*, Chun Liang Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Plumbene, with a structure similar to graphene, is expected to possess a strong spin–orbit coupling and thus enhances its superconducting critical temperature (Tc). In this work, a buckled plumbene-Au Kagome superstructure grown by depositing Au on Pb(111) is investigated. The superconducting gap monitored by temperature-dependent scanning tunneling microscopy/spectroscopy shows that the buckled plumbene-Au Kagome superstructure not only has an enhanced Tc with respect to that of a monolayer Pb but also possesses a higher value than what owned by a bulk Pb substrate. By combining angle-resolved photoemission spectroscopy with density functional theory, the monolayer Au-intercalated low-buckled plumbene sandwiched between the top Au Kagome layer and the bottom Pb(111) substrate is confirmed and the electron–phonon coupling-enhanced superconductivity is revealed. This work demonstrates that a buckled plumbene-Au Kagome superstructure can enhance superconducting Tc and Rashba effect, effectively triggering the novel properties of a plumbene.

Original languageEnglish
JournalAdvanced Science
StateAccepted/In press - 2023


  • angle-resolved photoemission spectroscopy
  • buckled plumbene
  • density functional theory
  • electron–phonon coupling
  • Rashba effect
  • scanning tunneling microscopy
  • superconductivity


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