Abstract Body

Recently, several high-T_csuperconducting materials, such as H₃S [1] and LaH₁₀ [2], have been discovered under extremely high pressure. Although various candidates of superconductor are predicted under high pressure, the synthesis and electrical measurements for materials under high such extreme conditions are technically difficult because of the preparation of micro-electrodes into a tiny sample chamber of high-pressure apparatus. To solve this problem, we develop a novel technique for the exploration of superconductors under high pressure using a diamond anvil cell (DAC) with boron-doped diamond electrodes, as shown in FIg. 1. Our designed DAC can perform high-pressure synthesis, in-situ structural analysis, and in-situ electrical transport measurement without complex experimental techniques [3]. In the presentation, the detail of the DAC and discovered superconductors will be introduced.

References

[1] A. P. Drozdov et al., Nature 525, 73 (2015).
[2] M. Somayazulu et al., Phys. Rev. Lett. 122, 027001 (2019).
[3] R. Matsumoto et al., Appl. Phys. Lett. 119, 053502 (2021).

Acknowledgment

This work was partly supported by JSPS KAKENHI (Grant No. 19H02177, 20H05644, and 20K22420).