Signatures of topotactic hydrogen in nickelate superconductors

Abstract

Superconductivity has entered the nickel age marked by enormous experimental and theoretical efforts. Notwithstanding, synthesizing nickelate superconductors remains extremely challenging, not least due to incomplete oxygen reduction and topotactic hydrogen. Here, we present density-functional theory calculations, identify a phonon mode as a possible indication for topotactic hydrogen and discuss the charge redistribution patterns around oxygen and hydrogen impurities.

Paper solicited for the special issue 'New Spin on Metal-Insulator Transitions' of Crystals

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Cited by in corpus (6)

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• Limits to the strain engineering of layered square-planar nickelate thin films
• Synthesis and physical properties of LaNiO${}_2$ crystals
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