期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 78, 期 9, 页码 -出版社
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.78.093703
关键词
FeSe; high pressure; superconductivity; DC magnetization
资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan [20540355]
- Grants-in-Aid for Scientific Research [20540355] Funding Source: KAKEN
The pressure dependence of superconducting transition temperature T-c has been investigated through the DC magnetic measurements for FeSe0.8 and FeSe1.0. For both samples, with increasing pressure P, the T-c-P curve exhibits a two-step increase, showing a local maximum of similar to 11 K at P similar to 1.0 GPa and a rapid increase with an extremely large pressure coefficient for P > 1.5 GPa. T-c saturates at similar to 25 K (21 K) in FeSe1.0 (FeSe0.8) for P > 3GPa. A rapid decrease in superconducting volume fraction is observed with an increase in T-c above 1.5 GPa, suggesting the presence of electronic inhomogeneity.
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