Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2023
Enhanced Superconductivity and Rashba Effect in a Buckled Plumbene-Au Kagome Superstructure.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод пока не подготовлен
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Chen Wan-Hsin, Chen Chin-Hsuan, Chen Guan-Hao, Chen Wei-Chuan, Chen Fu-Xiang Rikudo, Chen Pei-Jung, Ku Chun-Kai, Lee Chang-Tsan, Kawakami Naoya, Li Jia-Ying, Matsuda Iwao, Chang Wen-Hao, Lin Juhn-Jong, Wu Chien-Te, Mou Chung-Yu, Jeng Horng-Tay, Tang Shu-Jung, Lin Chun-Liang
Аннотация
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.