[17a-C31-1~11] 11.1 Fundamental properties

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[17a-C31-5] High-pressure synthesis and characterization of new compound Sr₃Ni₂O₅Cl₂ that is candidate for superconductor

〇(D)Kazuki Yamane^1,2, Shintaro Adachi³, Ryo Matsumoto¹, Kensei Terashima¹, Hiroya Sakurai¹, Yoshihiko Takano^1,2 (1.NIMS, 2.Univ. of Tsukuba, 3.KUAS)

Keywords:

Superconductivity

Last year, it was reported that high pressure phase of La₃Ni₂O₇ is a high-temperature superconductor with a transition temperature T_c = 80 K, which has attracted much attention. La₃Ni₂O₇ under normal pressure has an orthorhombic structure and does not exhibit superconductivity, but it was reported that at 20 GPa, it undergoes a structural phase transition to a tetragonal structure and exhibit superconductivity. In this study, we focused on Sr₃Ni₂O₅Cl₂, which is theoretically predicted to have a tetragonal structure at ambient pressure, and synthesized and characterized its physical properties. We succeeded in synthesizing the target phase, Sr₃Ni₂O₅Cl₂, using the high-pressure synthesis method. When we measured the electrical resistance of the synthesized sample under high pressure, it was found to be an insulator up to 100 GPa and did not exhibit superconductivity. In the future, we will explore the possibility of carrier doping.