[16p-D209-1~14] 11.1 Fundamental properties

△ [16p-D209-10] Discovery of In-S superconductor by high pressure synthesis and in situ resistance measurement

〇Kazuki Yamane^1,2, Ryo Matsumoto¹, Terumasa Tadano¹, Kensei Terashima¹, Yoshihiko Takano^1,2 (1.NIMS, 2.Univ. of Tsukuba)

Keywords:Superconductivity

Compounds with a cubic Th₃P₄ - type structure are a group of substances that can be replaced with various elements at the cation site and the anion site, and exhibit various function. Our group developed a heater diamond anvil cell (DAC) that enables high-pressure synthesis and in-situ electrical resistance measurement, and succeeded in synthesizing cubic Sn₃S₄ and observing its superconductivity.
In this experiment, we focused on In₃S₄ related to Sn₃S₄. Using heater DAC, In₃S₄ was synthesized at high pressure, and superconductivity were investigated by in situ electrical resistance measurement.
Superconductivity of start material of In₃S₄ was observed at 7 K by measuring the temperature dependence of the electrical resistance at 35 GPa . And Superconductivity of T_c = 16 K was observed after heating sample. In the future, we will clarify the substance that exhibit a T_c of 16 K_. by X-ray diffraction analysis.