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Relationship Between Nematicity, Antiferromagnetic Fluctuations, and Superconductivity in FeSe1-xSx Revealed by NMR

Journal Article · · Frontiers in Physics
 [1];  [1]
  1. Ames Lab., and Iowa State Univ., Ames, IA (United States)

The S-substituted FeSe, FeSe1-xSx, under pressure (p), provides a versatile platform for studying the relationship among nematicity, antiferromagnetism, and superconductivity. Here we present a short review of the recent experimental evidence showing that nematicity has a remarkable impact on the relationship between antiferromagnetic fluctuations and superconductivity. This has been revealed by several 77Se nuclear magnetic resonance studies that have tracked the variability of antiferromagnetic fluctuations and superconducting transition temperature (Tc) as a function of x and p. Tc is roughly proportional to antiferromagnetic fluctuations in the presence or absence of nematic order suggesting the importance of antiferromagnetic fluctuations in the Cooper pairing mechanism in FeSe1-xSx. However, the antiferromagnetic fluctuations are more effective in enhancing superconductivity in the absence of nematicity as compared to when it is present. These experimental observations give renewed insights into the interrelationships between nematicity, magnetism, and superconductivity in Fe-based superconductors.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1856813
Report Number(s):
IS-J 10,749
Journal Information:
Frontiers in Physics, Journal Name: Frontiers in Physics Vol. 10; ISSN 2296-424X
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English

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