Abstract
is isostructural to the unconventional superconductor but with two electrons instead of two holes in the orbitals. Both materials are Hund’s metals, but while has a van Hove singularity in close proximity to the Fermi surface, the van Hove singularity of is far from the Fermi surface. By using density functional plus dynamical mean-field theory, we determine the relative influence of van Hove and Hund’s metal physics on the correlation properties. We show that theoretically predicted signatures of Hund’s metal physics occur on the occupied side of the electronic spectrum of , identifying as an ideal candidate system for a direct experimental confirmation of the theoretical concept of Hund’s metals via photoemission spectroscopy.
- Received 9 May 2020
- Accepted 22 September 2020
DOI:https://doi.org/10.1103/PhysRevLett.125.166401
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