Orbital-selective superconductivity in a two-band model of infinite-layer nickelates

Adhikary, P and Bandyopadhyay, S and Das, T and Dasgupta, I and Saha-Dasgupta, T (2020) Orbital-selective superconductivity in a two-band model of infinite-layer nickelates. In: Physical Review B, 102 (10).

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Abstract

In the present Rapid Communication, we explore superconductivity in NdNiO2 and LaNiO2 employing a first-principles derived low-energy model Hamiltonian, consisting of two orbitals: Ni x2-y2, and an axial orbital. The axial orbital is constructed out of Nd/La d, Ni 3z2-r2, 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 the interorbital Hubbard interaction in superconductivity, which turns out to be orbital selective. The axial orbital brings in material dependence to the problem, making NdNiO2 different from LaNiO2, thereby controlling the interorbital Hubbard interaction-assisted superconductivity. © 2020 American Physical Society.

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	Elsevier Ltd
Additional Information:	The copyright to this article belongs to the Authors.
Keywords:	Calculations; Eigenvalues and eigenfunctions; Lanthanum compounds; Neodymium compounds; Nickel; Spin fluctuations, Energy model; First principles; Hubbard interaction; Infinite-layer; Pairing interactions; Rapid communication; Superconducting pairing; Two-band model, Nickel compounds
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	30 Dec 2021 04:37
Last Modified:	30 Dec 2021 04:37
URI:	http://eprints.iisc.ac.in/id/eprint/67389

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