Electron-phonon mediated superconductivity in La$_6$Ni$_5$O$_{12}$ nickel oxides

Alvaro Adrian Carrasco Alvarez; Sebastien Petit; Lucia Iglesias; Manuel Bibes; Wilfrid Prellier; Julien Varignon

doi:10.1103/PhysRevB.110.235107

paper

Electron-phonon mediated superconductivity in La $_{6}$ Ni $_{5}$ O $_{12}$ nickel oxides

arXiv:2311.13674 · doi:10.1103/PhysRevB.110.235107

Abstract

Nickel oxide superconductors offer an alternative playground for understanding the formation of Cooper pairs in correlated materials such as the famous cuprates. By studying the La $_{n + 1}$ Ni $_{n}$ O $_{2 n + 2}$ phase diagram on the basis of hybrid and spin-polarized density functional theory simulations, we reveal the existence of charge and bond ordered (CBO) insulating phases that are quenched by doping effects, ultimately resulting in a metallic phase at the n=5 member. Nevertheless, the phonons associated with the CBO identified in the phase diagram remain sufficiently large to mediate Cooper pairs in La $_{6}$ Ni $_{5}$ O $_{12}$ , yielding a computed critical temperature between T $_{c}$ =11-19K consistent with the 13K observed experimentally in Nd $_{6}$ Ni $_{5}$ O $_{12}$ . Thus, in order to identify the superconducting mechanism, extracting the relevant instabilities in the doping phase diagram of superconductors appears critical.

Electron-phonon mediated superconductivity in La $_{6}$ Ni $_{5}$ O $_{12}$ nickel oxides

Abstract

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Electron-phonon mediated superconductivity in La6​Ni5​O12​ nickel oxides

Abstract

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Cited by in corpus (3)

Electron-phonon mediated superconductivity in La $_{6}$ Ni $_{5}$ O $_{12}$ nickel oxides