Physics

Unconventional superconductivity without doping in infinite-layer nickelates under pressure

S. D. Cataldo, P. Worm, et al.

This groundbreaking study conducted by Simone Di Cataldo, Paul Worm, Jan M. Tomczak, Liang Si, and Karsten Held explores how pressure dramatically enhances superconductivity in infinite-layer nickelates. The research reveals a startling prediction: the parent compound PrNiO2 could achieve a remarkable critical temperature of 100 K under extreme pressure, rivaling the best cuprates.

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Abstract

This study investigates the impact of pressure on the superconductivity of infinite-layer nickelates, specifically SrxPr1-xNiO2, using the dynamical vertex approximation (DIA). The researchers successfully reproduce the experimental observation of increased critical temperature (Tc) under pressure up to 12 GPa and predict further enhancement at higher pressures. Importantly, even without Sr doping, the parent compound PrNiO2 exhibits high-temperature superconductivity due to pressure-enhanced self-doping of the Ni dx2-y2 orbital, reaching a predicted maximum Tc of 100 K around 100 GPa, comparable to the best cuprates.

Publisher

Nature Communications

Published On

May 10, 2024

Authors

Simone Di Cataldo, Paul Worm, Jan M. Tomczak, Liang Si, Karsten Held