2020/06/17 by Ryo Matsumoto, Mari Einaga, Shintaro Adachi +7 · 17 citations
Chemistry · Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Diamond #Diamond anvil cell #Electrical conductor #Electrical resistivity and conductivity #Electrode #Fabrication #High-pressure geophysics and materials #Hydrogen Storage and Materials #Sulfur #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1088/1361-6668/abbdc5
published in Superconductor Science and Technology 33(12), 124005 (IOP Publishing)
arxiv created 2020/06/17 · openalex created_date 2020/06/25 · openalex publication_date 2020/10/02 · arxiv updated 2020/12/02 · openalex updated_date 2026/08/06
Abstract A diamond anvil cell (DAC) has become an effective tool for investigating physical phenomena that occur at extremely high pressure, such as high-transition temperature superconductivity. Electrical transport measurements, which are used to characterize one of the most important properties of superconducting materials, are difficult to perform using conventional DACs. The available sample space in conventional DACs is very small and there is an added risk of electrode deformation under extreme operating conditions. To overcome these limitations, we herein report the fabrication of a boron-doped diamond microelectrode and undoped diamond insulation on a beveled culet surface of a diamond anvil. Using the newly developed DAC, we have performed in-situ electrical transport measurements on sulfur hydride H 2 S, which is a well-known precursor of the pressure-induced, high-transition temperature superconducting sulfur hydride, H 3 S. These measurements conducted under high pressures up to 192 GPa, indicated the presence of a multi-step superconducting transition, which we have attributed to elemental sulfur and possibly HS 2 .