Disappearance and Survival of Superconductivity in FeSe under High Pressure
| Autor: | Miyoshi, Kiyotaka, Yamamoto, Shota, Shiota, Atsushi, Matsuoka, Takuya, Ohe, Masaki, Yamamoto, Yumi, Nishigori, Shijo |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | J. Phys. Soc. Jpn. 90, 073706 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.7566/JPSJ.90.073706 |
| Popis: | Superconductivity in FeSe was investigated under high pressure through the measurements of DC magnetization by using a diamond anvil cell. We successfully observed that the disappearance of the superconductivity as a results of the appearance of the non-superconducting ortho I\hspace{-1pt}I phase above $\sim$7 GPa ($\sim$5 GPa), when Ar (glycerin) is used as the pressure transmitting media. Contrary to this, it has been found that the superconductivity even survives under pressure above 7 GPa, when the thickness ($t$) of a platelet-single crystal specimen is reduced. The survival of the superconductivity above 7 GPa is consistent with a previous observation under hydrostatic pressure by using a cubic anvil apparatus, suggesting that the hydrostaticity of the pressure is improved by reducing $t$. It is also inferred that the appearance of the ortho I\hspace{-1pt}I phase is due to uniaxial stress along the [001] direction. Comment: 6 pages, 4 figures |
| Databáze: | arXiv |
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