Enhancement for phonon-mediated superconductivity up to 37 K in few-hydrogen metal-bonded layered magnesium hydride under atmospheric pressure.

He, Yong; Du, Juan; Liu, Shi-Ming; Tian, Chong; Zhang, Min; Zhu, Yao-Hui; Zhong, Hongxia; Wang, Xinqiang; Shi, Jun-Jie

He, Yong; Du, Juan; Liu, Shi-Ming; Tian, Chong; Zhang, Min; Zhu, Yao-Hui; Zhong, Hongxia; Wang, Xinqiang; Shi, Jun-Jie.

Afiliación

He Y; State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University Yangtze Delta Institute of Optoelectronics, Peking University, Beijing 100871, China. jjshi@pku.edu.cn.
Du J; Department of Physics and Optoelectronic Engineering Faculty of Science, Beijing University of Technology, Beijing 100124, China. dujuan1121@bjut.edu.cn.
Liu SM; State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University Yangtze Delta Institute of Optoelectronics, Peking University, Beijing 100871, China. jjshi@pku.edu.cn.
Tian C; State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University Yangtze Delta Institute of Optoelectronics, Peking University, Beijing 100871, China. jjshi@pku.edu.cn.
Zhang M; Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, China.
Zhu YH; Physics Department, Beijing Technology and Business University, Beijing 100048, China.
Zhong H; School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China.
Wang X; State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University Yangtze Delta Institute of Optoelectronics, Peking University, Beijing 100871, China. jjshi@pku.edu.cn.
Shi JJ; State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University Yangtze Delta Institute of Optoelectronics, Peking University, Beijing 100871, China. jjshi@pku.edu.cn.

Phys Chem Chem Phys ; 25(31): 21037-21044, 2023 Aug 09.

Article en En | MEDLINE | ID: mdl-37522183

RESUMEN

The discovery of superconductivity in layered MgB2 has renewed interest in the search for high-temperature conventional superconductors, leading to the synthesis of numerous hydrogen-dominated materials with high critical temperatures (Tc) under high pressures. However, achieving a high-Tc superconductor under ambient pressure remains a challenging goal. In this study, we propose a novel approach to realize a high-temperature superconductor under ambient pressure by introducing a hexagonal H monolayer into the hexagonal close-packed magnesium lattice, resulting in a new and stable few-hydrogen metal-bonded layered magnesium hydride (Mg4)2H1. This compound exhibits superior ductility compared to multi-hydrogen, cuprate, and iron-based superconductors due to its metallic bonding. Our unconventional strategy diverges from the conventional design principles used in hydrogen-dominated covalent high-temperature superconductors. Using anisotropic Migdal-Eliashberg equations, we demonstrate that the stable (Mg4)2H1 compound is a typical phonon-mediated superconductor, characterized by strong electron-phonon coupling and an excellent Tc of 37 K under ambient conditions, comparable to that of MgB2. Our findings not only present a new pathway for exploring high-temperature superconductors but also provide valuable insights for future experimental synthesis endeavors.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Chem Chem Phys Asunto de la revista: BIOFISICA / QUIMICA Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido

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