Superconductivity in Cubic La_(3)Al with Interstitial Anionic Electrons  

作　　者：Zhijun Tu Peihan Sun Donghan Jia Huiyang Gou Kai Liu Hechang Lei 涂志俊;孙培函;贾东翰;缑慧阳;刘凯;雷和畅(School of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials&MicroNano Devices,Renmin University of China,Beijing 100872,China;Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education),Renmin University of China,Beijing 100872,China;Department of Physics,School of Science,Hebei University of Science and Technology,Shijiazhuang 050018,China;Center for High Pressure Science and Technology Advanced Research,Beijing 100193,China)

机构地区：[1]School of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials&MicroNano Devices,Renmin University of China,Beijing 100872,China [2]Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education),Renmin University of China,Beijing 100872,China [3]Department of Physics,School of Science,Hebei University of Science and Technology,Shijiazhuang 050018,China [4]Center for High Pressure Science and Technology Advanced Research,Beijing 100193,China

出　　处：《Chinese Physics Letters》2025年第2期88-97,共10页中国物理快报(英文版)

基　　金：supported by the National Key R&D Program of China(Grant Nos.2022YFA1403800,2023YFA1406500,and 2022YFA1403103);the National Natural Science Foundation of China(Grant Nos.12274459,12174443,12074013,and 12404266);the Science Research Project of Hebei Education Department(Grant No.BJ2025060)。

摘　　要：We observed superconductivity in a cubic La_(3)Al single crystal that exhibits metallic behavior in the normal state without an observable structural transition and enters the superconducting state below T_(c)~6.32 K.Detailed characterization and analysis indicate that cubic La_(3)Al is a bulk type-Ⅱ BCS superconductor.Moreover,theoretical calculations show that it can host interstitial anionic electrons located at the body center of the cubic unit cell,which confirms electron-phonon coupling as the superconducting mechanism.Therefore,cubic La_(3)Al can be considered as a novel electride superconductor.

关 键 词：mechanism CUBIC 

分 类 号：O469[理学—凝聚态物理]