Superconducting phase diagram of finite-layer nickelates Nd n+1Ni n O2n+2
Abstrak
Abstract Following the successful prediction of the superconducting phase diagram for infinite-layer nickelates, here we calculate the superconducting T c vs. the number of layers n for finite-layer nickelates using the dynamical vertex approximation. To this end, we start with density functional theory, and include local correlations non-perturbatively by dynamical mean-field theory for n = 2–7. For all n, the Ni $${d}_{{x}^{2}-{y}^{2}}$$ d x 2 − y 2 orbital crosses the Fermi level, but for n > 4 there are additional (π, π) pockets or tubes that slightly enhance the layer-averaged hole doping of the $${d}_{{x}^{2}-{y}^{2}}$$ d x 2 − y 2 orbitals beyond the leading 1/n contribution stemming from the valence electron count. We finally calculate T c for the single-orbital $${d}_{{x}^{2}-{y}^{2}}$$ d x 2 − y 2 Hubbard model by dynamical vertex approximation.
Topik & Kata Kunci
Penulis (5)
Andreas Hausoel
Simone Di Cataldo
Motoharu Kitatani
Oleg Janson
Karsten Held
Akses Cepat
- Tahun Terbit
- 2025
- Sumber Database
- DOAJ
- DOI
- 10.1038/s41535-025-00786-z
- Akses
- Open Access ✓