Unconventional Pressure Dependent Interorbital and Interlayer Doping in Superconducting Nickelates

Y. N. Huang; D. J. Singh

doi:10.1103/PhysRevB.110.174501

paper

Unconventional Pressure Dependent Interorbital and Interlayer Doping in Superconducting Nickelates

arXiv:2407.16495 · doi:10.1103/PhysRevB.110.174501

Abstract

The discovery of nickelate superconductivity provided the first example of a non-copper-based material with superconductivity strongly analogous to the cuprates, but recent findings raise questions and inconsistencies around the electron counts and doping phase diagrams. We show using superconducting La $_{4}$ Ni $_{3}$ O $_{10}$ that there are unconventional interlayer and interorbital intrinsic doping effects that render the $d_{x^{2} - y^{2}}$ orbital occupation similar to the cuprates. The results enable a consistent framework for nickelate superconductivity, while maintaining the connection between cuprate and nickelate superconductors.

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