Bismuthates under high pressure. Ab-initio study At ambient pressure ABiO$_3$ (A=Ba,Sr,Ca) bismuthates are 3D charge density wave (CDW) insulators, exhibiting insulator to metal transition upon hole doping and supeconductivity with T$_c$'s up to 34$~$K can occur in the metallic phase. However, little is known about their high-pressure behavior. |