期刊
PHYSICAL REVIEW B
卷 98, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.98.020507
关键词
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资金
- US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering
- US Department of Energy [DE-AC02-07CH11358]
We present Se-77-NMR measurements on FeSe1-xSx samples with sulfur content x = 0%, 9%, 15%, and 29%. Twinned nematic domains are observed in the NMR spectrum for all samples except x = 29%. The NMR spin-lattice relaxation rate shows that antiferromagnetic (AFM) fluctuations are initially enhanced between x = 0% and x = 9%, but are strongly suppressed for higher x values. The observed behavior of the AFM fluctuations parallels the superconducting transition temperature T-c in these materials, providing strong evidence for the primary importance of AFM fluctuations for superconductivity, despite the presence of nematic quantum criticality in the FeSe1-xSx system.
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