Journal article

From high T-c to low T-c: Multiorbital effects in transition metal oxides

Michael Klett, Tilman Schwemmer, Sebastian Wolf, Xianxin Wu, David Riegler, Andreas Dittmaier, Domenico Di Sante, Gang Li, Werner Hanke, Stephan Rachel, Ronny Thomale

PHYSICAL REVIEW B | AMER PHYSICAL SOC | Published : 2021

Abstract

Despite the structural resemblance of certain cuprate and nickelate parent compounds there is a striking spread of Tc among such transition metal oxide superconductors. We adopt a minimal two-orbital eg model which covers cuprates and nickelate heterostructures in different parametric limits, and analyze its superconducting instabilities. The joint consideration of interactions, doping, fermiology, and in particular the eg orbital splitting allows us to explain the strongly differing pairing propensities in cuprate and nickelate superconductors.

University of Melbourne Researchers

Grants

Awarded by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)


Awarded by Australian Research Council


Awarded by European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant


Funding Acknowledgements

This work is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through Project-ID 258499086 -SFB 1170 and through the Wurzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter-ct.qmat ProjectID 390858490 -EXC 2147. S.R. acknowledges support from the Australian Research Council through Gratns No. FT180100211 and No. DP200101118. We further gratefully acknowledge the Gauss Centre for Supercomputing e.V. [35] for providing computing time on the GCS Supercomputer SuperMUC at Leibniz Supercomputing Centre [36] and the HPC facility Spartan [37] hosted at the University of Melbourne. The research leading to these results has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant Agreement No. 897276.