Impact of Nematicity on the Relationship between Antiferromagnetic Fluctuations and Superconductivity in FeSe0.91S0.09 Under Pressure

Abstract

The sulfur substituted FeSe system, FeSe${}_{1-x}$S${}_x$, provides a versatile platform for studying the relationship between nematicity, antiferromagnetism, and superconductivity. Here, by nuclear magnetic resonance (NMR) and resistivity measurements up to 4.73 GPa on FeSe${}_{0.91}$S${}_{0.09}$, we established the pressure($p$)-temperature($T$) phase diagram in which the nematic state is suppressed with pressure showing a nematic quantum phase transition (QPT) around $p$ = 0.5 GPa, two SC regions, separated by the QPT, appear and antiferromagnetic (AFM) phase emerges above $\sim$3.3 GPa. From the NMR results up to 2.1 GPa, AFM fluctuations are revealed to be characterized by the stripe-type wavevector which remains the same for the two SC regions. Furthermore, the electronic state is found to change in character from non-Fermi liquid to Fermi liquid around the nematic QPT and persists up to $\sim$ 2.1 GPa. In addition, although the AFM fluctuations correlate with $T_{\mathrm{c}}$ in both SC states, demonstrating the importance of the AFM fluctuations for the appearance of SC in the system, we found that, when nematic order is absent, $T_{\mathrm{c}}$ is strongly correlated with the AFM fluctuations, whereas $T_{\mathrm{c}}$ weakly depends on the AFM fluctuations when nematic order is present. Our findings on FeSe${}_{0.91}$S${}_{0.09}$ were shown to be applied to the whole FeSe${}_{1-x}$S${}_x$ system and also provide a new insight into the relationship between AFM fluctuations and SC in Fe-based superconductors.

arXiv comment10 pages, 10 figures including 4 pages and 6 figures of Supplementary Material, accepted for publication in Phys. Rev. B rapid communication

References in corpus (36)

• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Superconductivity in Iron Compounds
• A Common Thread: the pairing interaction for the unconventional superconductors
• Nematic order in iron superconductors - who is in the driver's seat?
• The Structural Phase Transition in FeSe (Fe1+dSe)
• FeAs-based superconductivity: a case study of the effects of transition metal doping on BaFe2As2
• Why Does Undoped FeSe Become A High Tc Superconductor Under Pressure?
• Preemptive nematic order, pseudogap, and orbital order in the iron pnictides
• Nematic quantum critical point without magnetism in FeSe1-xSx superconductors
• Nematicity, magnetism and superconductivity in FeSe
• Maximizing Tc by tuning nematicity and magnetism in FeSe1-xSx superconductors
• Variation of transition temperatures and residual resistivity ratio in vapor-grown FeSe
• Suppression of orbital ordering by chemical pressure in FeSe1-xSx
• Two distinct superconducting pairing states divided by the nematic end point in FeSe${}_{1-x}$S${}_x$
• Superconducting properties of sulfur-doped iron selenide
• Highly Anisotropic Superconducting Gap in Nematically Ordered and Tetragonal Phases of FeSe${}_{1-x}$S${}_x$
• Evolution of the Fermi surface of the nematic superconductors FeSe1-xSx
• Suppression of electronic correlations by chemical pressure from FeSe to FeS
• Orbital upper critical field of type-II superconductors with pair breaking
• Crystallographic, Electronic, Thermal and Magnetic Properties of Single-Crystal SrCo2As2
• Antiferromagnetism of SrFe2As2 studied by Single-Crystal 75As-NMR
• Solidification and loss of hydrostaticity in liquid media used for pressure measurements
• Quenched nematic criticality separating two superconducting domes in an iron-based superconductor under pressure
• Non-monotonic pressure evolution of the upper critical field in superconducting FeSe
• Stripe antiferromagnetic correlations in LaFeAsO1-xFx probed by 75As NMR
• Correlation between Superconductivity and Magnetic Fluctuations in Fe(Se1-xSx) Revealed by 77Se NMR
• Potential antiferromagnetic fluctuations in hole-doped iron-pnictide superconductor Ba_{1-x}K_{x}Fe_{2}As_{2} studied by ^{75}As nuclear magnetic
• Dome of magnetic order inside the nematic phase of sulfur-substituted FeSe under pressure
• Upper critical field of KFe2As2 under pressure: A test for the change in the superconducting gap structure
• NMR evidence for static local nematicity and its cooperative interplay with low-energy magnetic fluctuations in FeSe under pressure
• The suppression of electron correlations in the collapsed tetragonal phase of CaFe2As2 under ambient pressure demonstrated by 75As NMR-NQR measurements
• Separate tuning of nematicity and spin fluctuations to unravel the origin of superconductivity in FeSe
• Volovik Effect and Fermi-Liquid Behavior in the s-Wave Superconductor CaPd2As2: 75As NMR-NQR Measurements
• Extended Magnetic Dome Induced by Low Pressures in Superconducting FeSe${}_{1\text{-}\mathrm{x}}$S${}_{\mathrm{x}}$
• ${}^{77}$Se-NMR Study under Pressure on 12%-S Doped FeSe
• Changing the type of superconductivity by magnetic and potential scattering

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