Theoretical study of the electronic correlation and superconducting pairing in La 2.85 Pr 0.15 Ni 2 O 7 film grown on SrLaAlO 4
Abstract
Abstract We investigate the electronic correlation effects in La 2.85 Pr 0.15 Ni 2 O 7 film grown on SrLaAlO 4 by fluctuation-exchange approximation. The γ and δ bands are found to shift down with correlation while their Fermi surfaces become highly damped and cannot to be resolved experimentally. In contrast, the α and β Fermi surfaces do not vary much with correlation and they are sharp enough to be detected in experiments. The spin susceptibility peaks at a wave vector in the odd channel, connecting the symmetric γ band and the asymmetric δ band. The superconducting pairing symmetry is robustly s -wave and the δ band has the largest pairing magnitude. All the findings suggest a dominant role of the 3 d z 2 orbital in this material.
Fields of Study & Subjects
Magnetic and transport properties of perovskites and related materials
Physics of Superconductivity and Magnetism
Electronic and Structural Properties of Oxides
Publication details
- Journal / source
- Journal of Physics Condensed Matter
- Publisher
- IOP Publishing
- Volume
- 38
- Issue
- 5
- Pages
- 055601–055601
- Publication date
- 20 January 2026
- Language
- EN