A recent experiment [X. Ding et al., Nature (London) 615, 50 (2023)] indicates that superconductivity in nickelates is restricted to a narrow window of hydrogen concentration, 0.22 < x < 0.28 in Nd0.8Sr0.2NiO2Hx. This reported necessity of hydrogen suggests that it plays a crucial role for superconductivity, as it does in the vast field of hydride superconductors. Using density-functional theory and its extensions, we explore the effect of topotactic hydrogen on the electronic structure and phonon-mediated superconductivity in nickelate superconductors. Our calculations show that the electron-phonon coupling in hydrogen-intercalated nickelates is not strong enough to drive the electron pairing, and thus cannot explain the reported superconductivity.

Absence of electron-phonon-mediated superconductivity in hydrogen-intercalated nickelates / DI CATALDO, Simone; Worm, Paul; Si, Liang; Held, Karsten. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 108:17(2023). [10.1103/PhysRevB.108.174512]

Absence of electron-phonon-mediated superconductivity in hydrogen-intercalated nickelates

Simone Di Cataldo
Primo
Investigation
;
2023

Abstract

A recent experiment [X. Ding et al., Nature (London) 615, 50 (2023)] indicates that superconductivity in nickelates is restricted to a narrow window of hydrogen concentration, 0.22 < x < 0.28 in Nd0.8Sr0.2NiO2Hx. This reported necessity of hydrogen suggests that it plays a crucial role for superconductivity, as it does in the vast field of hydride superconductors. Using density-functional theory and its extensions, we explore the effect of topotactic hydrogen on the electronic structure and phonon-mediated superconductivity in nickelate superconductors. Our calculations show that the electron-phonon coupling in hydrogen-intercalated nickelates is not strong enough to drive the electron pairing, and thus cannot explain the reported superconductivity.
2023
superconductivity; condensed matter; electron-phonon; electronic structure;
01 Pubblicazione su rivista::01a Articolo in rivista
Absence of electron-phonon-mediated superconductivity in hydrogen-intercalated nickelates / DI CATALDO, Simone; Worm, Paul; Si, Liang; Held, Karsten. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 108:17(2023). [10.1103/PhysRevB.108.174512]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1693400
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