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Title: Persistent Correlation between Superconductivity and Antiferromagnetic Fluctuations near a Nematic Quantum Critical Point in FeSe 1-xS x

Here, we present 77Se-NMR measurements on FeSe 1-xS x 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 FeSe 1-xS x system.
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy; Karlsruhe Inst. of Technology (KIT) (Germany). Inst. fur Festkörperphysik
Publication Date:
Report Number(s):
IS-J-9716
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:
AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 98; Journal Issue: 2; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1464474
Alternate Identifier(s):
OSTI ID: 1461910

Wiecki, P., Rana, K., Böhmer, A. E., Lee, Y., Bud'ko, S. L., Canfield, P. C., and Furukawa, Y.. Persistent Correlation between Superconductivity and Antiferromagnetic Fluctuations near a Nematic Quantum Critical Point in FeSe1-xSx. United States: N. p., Web. doi:10.1103/PhysRevB.98.020507.
Wiecki, P., Rana, K., Böhmer, A. E., Lee, Y., Bud'ko, S. L., Canfield, P. C., & Furukawa, Y.. Persistent Correlation between Superconductivity and Antiferromagnetic Fluctuations near a Nematic Quantum Critical Point in FeSe1-xSx. United States. doi:10.1103/PhysRevB.98.020507.
Wiecki, P., Rana, K., Böhmer, A. E., Lee, Y., Bud'ko, S. L., Canfield, P. C., and Furukawa, Y.. 2018. "Persistent Correlation between Superconductivity and Antiferromagnetic Fluctuations near a Nematic Quantum Critical Point in FeSe1-xSx". United States. doi:10.1103/PhysRevB.98.020507.
@article{osti_1464474,
title = {Persistent Correlation between Superconductivity and Antiferromagnetic Fluctuations near a Nematic Quantum Critical Point in FeSe1-xSx},
author = {Wiecki, P. and Rana, K. and Böhmer, A. E. and Lee, Y. and Bud'ko, S. L. and Canfield, P. C. and Furukawa, Y.},
abstractNote = {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.},
doi = {10.1103/PhysRevB.98.020507},
journal = {Physical Review B},
number = 2,
volume = 98,
place = {United States},
year = {2018},
month = {7}
}

Works referenced in this record:

Generalized Gradient Approximation Made Simple
journal, October 1996
  • Perdew, John P.; Burke, Kieron; Ernzerhof, Matthias
  • Physical Review Letters, Vol. 77, Issue 18, p. 3865-3868
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