Noncentrosymmetric High-Temperature Superconductivity in doped $d^9$ Multiferroics

Abstract

Multiferroics with $d^9$ electronic configurations, such as $SnCuO_2$, $PbCuO_2$, and $BiNiO_2$, exhibit coexisting antiferromagnetic order and ferroelectricity. Motivated by the fundamental link between symmetry breaking, strong electron correlations, and unconventional superconductivity, we propose a materials design strategy targeting noncentrosymmetric high-temperature superconductors through chemical doping of engineered $d^9$ multiferroics. This approach bridges two phenomena: (i) the coexistence of antiferromagnetism and ferroelectricity in correlated insulators, and (ii) the emergence of superconductivity in doped Mott/charge-transfer systems.