2019 年 29 巻 4 号 p. 242-248
Great interests have been attracted for the strongly correlated electron systems, which often show novel physical properties based on the unknown aspect of nature. A high-Tc cuprate and an iron-based superconductor are the examples of such systems and many high-pressure works have been performed because of showing large pressure effect on Tc. In the way of the study of cuprate superconductors, the pressure-induced superconductivity was discovered in spin-ladder type cuprate Sr14－xCaxCu24O41, which contributed the study of high-Tc superconductivity. Recently, in case of iron-based superconductors, pressure-induced superconductivity was discovered in the spin-ladder type iron-based compound BaFe2S3. This discovery promotes the development of the study of the iron-based superconductors.
