Electronic and magnetic excitations in La3Ni2O7
Fudan University · State Key Laboratory of Surface Physics · +12 more institutions
Abstract
High-temperature superconductivity was discovered in the pressurized nickelate La3Ni2O7 which has a unique bilayer structure and mixed valence state of nickel. The properties at ambient pressure contain crucial information of the fundamental interactions and bosons mediating superconducting pairing. Here, using X-ray absorption spectroscopy and resonant inelastic X-ray scattering, we identified that Ni 3 $${d}_{{x}^{2}-{y}^{2}}$$ , Ni 3 $${d}_{{z}^{2}}$$ , and ligand oxygen 2p orbitals dominate the low-energy physics with a small charge-transfer energy. Well-defined optical-like magnetic excitations soften into quasi-static spin-density-wave ordering, evidencing the strong electronic correlation and rich…
Citation impact
- FWCI
- 12.69
- Percentile
- 100%
- References
- 75
Authors
16- XCXiaoyang ChenCorresponding
Fudan University, State Key Laboratory of Surface Physics
- JCJaewon Choi
Diamond Light Source
- ZJZhicheng Jiang
University of Science and Technology of China, National Synchrotron Radiation Laboratory
- JMJiong Mei
Chinese Academy of Sciences, Institute of Physics, National Laboratory for Superconductivity, University of Chinese Academy of Sciences
- KJKun Jiang
Chinese Academy of Sciences, Institute of Physics, National Laboratory for Superconductivity, University of Chinese Academy of Sciences
Topics & keywords
- Computer science
- Physics
Funding
- DLDiamond Light Source
- NRNational Research Foundation
- NNNational Natural Science Foundation of ChinaAwards: 2023YFA1406500, 12174428, U2032208, 12174454, 11888101, 12274207
- SYSun Yat-sen University
- NRNational Research Foundation of KoreaAward: RS-2023-00252768
- MOMinistry of Science and ICT, South KoreaAward: RS-2023-00252768