Electronic correlations and partial gap in the bilayer nickelate La3Ni2O7
Collaborative Innovation Center of Advanced Microstructures · Nanjing University · +1 more institution
Abstract
The discovery of superconductivity with a critical temperature of about 80 K in La3Ni2O7 single crystals under pressure has received enormous attention. La3Ni2O7 is not superconducting under ambient pressure but exhibits a transition at T ∗ ≃ 115 K. Understanding the electronic correlations and charge dynamics is an important step towards the origin of superconductivity and other instabilities. Here, our optical study shows that La3Ni2O7 features strong electronic correlations which significantly reduce the electron’s kinetic energy and place this system in the proximity of the Mott phase. The low-frequency optical conductivity reveals two Drude components arising from multiple bands at the Fermi level. The…
Citation impact
- FWCI
- 12.37
- Percentile
- 100%
- References
- 72
Authors
11- ZLZhe LiuCorresponding
Collaborative Innovation Center of Advanced Microstructures, Nanjing University
- MHMengwu Huo
Sun Yat-sen University
- JLJie Li
Collaborative Innovation Center of Advanced Microstructures, Nanjing University
- QLQing Li
Collaborative Innovation Center of Advanced Microstructures, Nanjing University
- YLYuecong Liu
Collaborative Innovation Center of Advanced Microstructures, Nanjing University
Topics & keywords
- Condensed matter physics
- Superconductivity
- Fermi surface
- Fermi level
- Optical conductivity
- Pseudogap
- Ambient pressure
- Fermi liquid theory