Superconductivity in (Ba,K)SbO₃.

ABSTRACT: (Ba,K)BiO₃ constitute an interesting class of superconductors, where the remarkably high superconducting transition temperature T_c of 30 K arises in proximity to charge density wave order. However, the precise mechanism behind these phases remains unclear. Here, enabled by high-pressure synthesis, we report superconductivity in (Ba,K)SbO₃ with a positive oxygen-metal charge transfer energy in contrast to (Ba,K)BiO₃. The parent compound BaSbO_3-δ shows a larger charge density wave gap compared to BaBiO₃. As the charge density wave order is suppressed via potassium substitution up to 65%, superconductivity emerges, rising up to T_c = 15 K. This value is lower than the maximum T_c of (Ba,K)BiO₃, bu

SUBMITTER: Kim M 

PROVIDER: S-EPMC9156407 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature