期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 77, 期 11, 页码 -出版社
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.77.113703
关键词
FeSe; superconductivity; NMR
资金
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan [19105006, 19204036, 19014016, 19051014, 19340103, 19014018, 20045010]
- JSPS Research Fellow
- Grants-in-Aid for Scientific Research [19014018, 19340103, 20045010, 19051014, 19204036] Funding Source: KAKEN
We report the results of Se-77-nuclear magnetic resonance (NMR) in alpha-FeSe, which exhibits a similar crystal structure to the LaFeAsO1-xFx superconductor and shows superconductivity at 8 K. The nuclear-spin lattice relaxation rate 1/T-1 shows T-3 behavior below the superconducting transition temperature T-c without a coherence peak. The T1T = const. behavior, indicative of the Fermi liquid state, can be seen in a wide temperature range above T-c. The superconductivity in alpha-FeSe is also an unconventional one as well as LaFeAsO1-xFx and related materials. The FeAs layer is not essential for the occurrence of the unconventional superconductivity.
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