Superconductivity in infinite-layer nickelates

TL;DR

This paper reviews recent experimental and theoretical research on superconductivity in doped infinite-layer nickelates, highlighting their similarities to cuprates and exploring implications for understanding high-temperature superconductivity.

Contribution

It provides a comprehensive overview of the current state of research on nickelate superconductors and discusses future directions in this emerging field.

Findings

Nickelates are structurally similar to cuprates with high $T_c$.

Superconductivity observed in doped $R$NiO$_2$ compounds.

Insights into mechanisms of high-$T_c$ superconductivity in correlated oxides.

Abstract

The recent discovery of the superconductivity in the doped infinite layer nickelates $R$NiO$_2$ ($R$=La, Pr, Nd) is of great interest since the nickelates are isostructural to doped (Ca,Sr)CuO$_2$ having superconducting transition temperature ($T_{\rm c}$) of about 110 K. Verifying the commonalities and differences between these oxides will certainly give a new insight into the mechanism of high $T_{\rm c}$ superconductivity in correlated electron systems. In this paper, we review experimental and theoretical works on this new superconductor and discuss the future perspectives for the "nickel age" of superconductivity.