Electrical resistivity measurements under high pressure for Nd3.5Sm0.5Ni3O8

Nd3.5Sm0.5Ni3O8 is a candidate for high-Tc superconductor, due to the close structural and electrical similarities with high-Tc cuprates. In electrical resistivity measurement, Nd3.5Sm0.5Ni3O8 shows a semiconducting behavior. However, by intercalation and subsequent deintercalation treatments with sulfur, Nd3.5Sm0.5Ni3O8 displays metallic behavior down to 20 40 K, followed by the weak semiconducting tendency at lower temperatures. In this study, the electrical resistivity measurements under high pressures up to 2 GPa were performed for a semiconducting sample of Nd3.5Sm0.5Ni3O8. We discuss the electrical properties of this material, combining the high-pressure resistivity data with measurements on metallic samples at ambient pressure.