Persistent Correlation between Superconductivity and Antiferromagnetic Fluctuations near a Nematic Quantum Critical Point in FeSe1-xSx
Journal Article
·
· Physical Review B
- Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
- Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy; Karlsruhe Inst. of Technology (KIT) (Germany). Inst. fur Festkörperphysik
Here, we present 77Se-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 Tc 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.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC02-07CH11358
- OSTI ID:
- 1464474
- Alternate ID(s):
- OSTI ID: 1461910
- Report Number(s):
- IS-J--9716
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 2 Vol. 98; ISSN 2469-9950; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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