SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 44: Focus Session: Superconducting Nickelates I

TT 44.2: Hauptvortrag

Donnerstag, 30. März 2023, 10:00–10:30, HSZ 03

Nickelate and cuprate superconductors: Similar yet different — •Vamshi Mohan Katukuri — Max Planck Institute for Solid State Research, Stuttgart, Germany

The discovery of superconductivity in hole-doped infinite-layer NdNiO₂ – a transition metal oxide that is both isostructural and isoelectronic to cuprate superconductors – has lead to renewed enthusiasm in the hope of understanding the origin of unconventional superconductivity. In this talk, I will present and discuss the similarities and differences in the electronic structure of nickelates and cuprates from the perspective of ab initio many body wavefunction analysis derived from state-of-the-art quantum chemistry calculations. After highlighting the main differences in the parent (undoped) infinite-layered NdNiO₂ and CaCuO₂ compounds, I will discuss the character of the doped hole by analyzing the electron-removal (which mimics hole-doping) states in the two compounds. In the end, I will discuss the evolution of the electronic structure of nickelates under pressure.