2023/11/22 by Álvaro Adrián Carrasco Álvarez, S. Petit, Alvarez, Alvaro Adrian Carrasco +9 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Metallurgical Processes and Thermodynamics #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.2311.13674
openalex publication_date 2023/11/22 · openalex created_date 2023/11/28 · openalex updated_date 2026/07/28
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 Lan+1NinO2n+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 La6Ni5O12, yielding a computed critical temperature between Tc=11-19K consistent with the 13K observed experimentally in Nd6Ni5O12. Thus, in order to identify the superconducting mechanism, extracting the relevant instabilities in the doping phase diagram of superconductors appears critical.