Superconductivity in nickel based 112 systems

Abstract

Superconductivity has been discovered recently in nickel based 112 infinite thin films $R_{1-x}$A${}_x$NiO${}_2$ ($R$ = La, Nd, Pr and A = Sr, Ca). They are isostructural to the infinite-layer cuprate (Ca,Sr)CuO${}_2$ and are supposed to have a formal Ni 3$d^9$ valence, thus providing a new platform to study the unconventional pairing mechanism of high-temperature superconductors. This important discovery immediately triggers a huge amount of innovative scientific curiosity in the field. In this paper, we try to give an overview of the recent research progress on the newly found superconducting nickelate systems, both from experimental and theoretical aspects. We will focus mainly on the electronic structures, magnetic excitations, phase diagrams, superconducting gaps and finally make some open discussions for possible pairing symmetries in Ni based 112 systems.

arXiv comment53 pages,10 figures,submitted to The Innovation

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Cited by in corpus (8)

• Pressure-induced monotonic enhancement of Tc to over 30 K in the superconducting Pr0.82Sr0.18NiO2 thin films
• Self-doping and the Mott-Kondo scenario for infinite-layer nickelate superconductors
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