Structural transition, electric transport, and electronic structures in the compressed trilayer nickelate LaNiO
作者机构：Center for Materials of the Universe School of Molecular Sciences Arizona State University Center for Neutron Science and Technology Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices School of Physics Sun Yat-sen University School of Sciences Sun Yat-sen University
出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学:物理学 力学 天文学(英文版))
年 卷 期：2024年
核心收录：
学科分类：07[理学] 08[工学] 070205[理学-凝聚态物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
基 金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 12174454, 12304187, U213010013, 92165204, and11974432) Guangdong Basic and Applied Basic Research Funds (Grant No. 2021B1515120015) Guangzhou Basic and Applied Basic Research Funds (Grant Nos. 202201011123, and 2024A04J6417) National Key Research and Development Program of China (Grant Nos. 2022YFA1402802,2023YFA1406500, and 2023YFA1406002) Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices (Grant No.2022B1212010008) Fundamental Research Funds for the Central Universities,Sun Yat-sen University (Grant No. 23qnpy57) Shenzhen International Quantum Academy. High-pressure synchrotron X-ray measurements were performed at the 4W2 High-Pressure Station Beijing Synchrotron Radiation Facility,which is supported by the Chinese Academy of Sciences (Grant Nos. KJCX2-SW-N20, and KJCX2-SW-N03)
摘 要：Atomic structure and electronic band structure are fundamental properties for understanding the mechanism of superconductivity. Motivated by the discovery of pressure-induced high-temperature superconductivity at 80 K in the bilayer Ruddlesden-Popper nickelate La3Ni2O7, the atomic structure and electronic band structure of the trilayer nickelate La4Ni3O10under pressure up to 44.3 GPa are investigated. A structural transition from the monoclinic P21/a space group to the tetragonal I4/mmm around 12.6-13.4 GPa is identified, accompanied by a drop of resistance below 7 K. Density functional theory calculations suggest that the bonding state of Ni 3dz2orbital rises and crosses the Fermi level at high pressures, which may give rise to possible superconductivity observed in resistance under pressure in La4Ni3O10. The trilayer nickelate La4Ni3O10shows some similarities with the bilayer La3Ni2O7and has unique properties, providing a new platform to investigate the underlying mechanism of superconductivity in nickelates.
同方期刊数据库