1. Enhanced Superconductivity and Rashba Effect in a Buckled Plumbene‐Au Kagome Superstructure
- Author
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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, and Chun‐Liang Lin
- Subjects
angle‐resolved photoemission spectroscopy ,buckled plumbene ,density functional theory ,electron–phonon coupling ,Rashba effect ,scanning tunneling microscopy ,Science - Abstract
Abstract 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.
- Published
- 2023
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