Orbital Selective Superconductivity in a Two-band Model of Infinite-Layer Nickelates

Abstract

In the present study, we explore superconductivity in NdNiO${}_2$ and LaNiO${}_2$ employing a first-principles derived low-energy model Hamiltonian, consisting of two orbitals: Ni $x^2$-$y^2$, and an {\it axial} orbital. The {\it axial} orbital is constructed out of Nd/La $d$, Ni 3$z^2$-$r^2$ and Ni $s$ characters. Calculation of the superconducting pairing symmetry and pairing eigenvalue of the spin-fluctuation mediated pairing interaction underlines the crucial role of inter-orbital Hubbard interaction in superconductivity, which turns out to be orbital-selective. The axial orbital brings in materials dependence in the problem, making NdNiO${}_2$ different from LaNiO${}_2$, thereby controlling the inter-orbital Hubbard interaction assisted superconductivity.

6 pages, 4 figures

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Cited by in corpus (9)

• Phase diagram of nickelate superconductors calculated by dynamical vertex approximation
• Dynamical Mean Field Studies of Infinite Layer Nickelates: Physics Results and Methodological Implications
• Electronic correlations and magnetic interactions in infinite-layer NdNiO${}_2$
• Infinite-layer nickelate superconductors: A current experimental perspective of the crystal and electronic structures
• Negligible oxygen vacancies, low critical current density, electric-field modulation, in-plane anisotropic and high-field transport of a superconducting Nd0.8Sr0.2NiO2/SrTiO3 heterostructure
• Interplay between Zhang-Rice singlets and high-spin states in a model for doped NiO${}_2$ planes
• Stabilization of singlet hole-doped state in infinite-layer nickelate superconductors
• Transport properties of the parent LaNiO2
• Character of Doped Holes in Nd${}_{1-x}$Sr${}_x$NiO${}_2$