期刊
INORGANIC CHEMISTRY
卷 60, 期 6, 页码 3585-3592出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.0c02836
关键词
-
资金
- MEXT [17K05500, 18K04940, 18K18736, 19H02676, 20H05878, 20H05879]
- Grants-in-Aid for Scientific Research [20H05879] Funding Source: KAKEN
The study investigated the pressure dependence of electric transport in Ba0.77Na0.23Ti2Sb2O and identified a structural phase transition at 8-11 GPa that significantly influenced superconductivity, showing a clear relationship between crystal structure and superconductivity.
We investigated the pressure dependence of electric transport in a superconducting sample, Ba0.77Na0.23Ti2Sb2O, to complete the phase diagram of superconducting transition temperature (T-c) against pressure (p). This superconducting sample exhibits a T-c value of 5.8 K at ambient pressure. Here, the superconductivity of the recently reported sample was investigated over a wide pressure range. The T-c value monotonously decreased with pressure below 8 GPa. Interestingly, the T-c value rapidly increased above 8 GPa and slowly declined with pressure above 11 GPa. Thus, a new superconducting phase was discovered above similar to 9 GPa. The crystal structure of Ba0.77Na0.23Ti2Sb2O was also elucidated at 0-22.0 GPa with synchrotron X-ray powder diffraction. Consequently, an evident relation between the crystal structure and the superconductivity was revealed, namely, a clear structural phase transition was observed at 8-11 GPa, where the T-c value rapidly increased against pressure. This study provides detailed information on the superconductivity of Ba0.77Na0.23Ti2Sb2O under pressure, which will lead to a comprehensive understanding of pressure-driven superconductivity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据