Orbital structure of the effective pairing interaction in the high-temperature superconducting cuprates
Open access
Date
2021Type
- Journal Article
Abstract
The nature of the effective interaction responsible for pairing in the high-temperature superconducting cuprates remains unsettled. This question has been studied extensively using the simplified single-band Hubbard model, which does not explicitly consider the orbital degrees of freedom of the relevant CuO2 planes. Here, we use a dynamical cluster quantum Monte Carlo approximation to study the orbital structure of the pairing interaction in the three-band Hubbard model, which treats the orbital degrees of freedom explicitly. We find that the interaction predominately acts between neighboring copper orbitals, but with significant additional weight appearing on the surrounding bonding molecular oxygen orbitals. By explicitly comparing these results to those from the simpler single-band Hubbard model, our study provides strong support for the single-band framework for describing superconductivity in the cuprates. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000476210Publication status
publishedExternal links
Journal / series
npj Quantum MaterialsVolume
Pages / Article No.
Publisher
NatureMore
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