${}^{77}$Se-NMR Study under Pressure on 12%-S Doped FeSe

Abstract

The 12%-S doped FeSe system has a high Tc of 30 K at a pressure of 3.0 GPa. We have successfully investigated its microscopic properties for the first time via ${}^{77}$Se-NMR measurements under pressure. The antiferromagnetic (AFM) fluctuations at the optimal pressure (~3 GPa) exhibited unexpected suppression compared with the AFM fluctuations at ambient pressure, even though the optimal pressure is close to the phase boundary of the AFM phase induced at the high-pressure region. In addition, we revealed that the SC phase at an applied field of 6.02 T exhibited a remarkable double-dome structure in the pressure-temperature phase diagram, unlike the SC phase at zero field.

arXiv admin note: substantial text overlap with arXiv:1807.07118

References in corpus (8)

• Why Does Undoped FeSe Become A High Tc Superconductor Under Pressure?
• Orbital-driven nematicity in FeSe
• Field-induced superconducting phase of FeSe in the BCS-BEC cross-over
• Emergence of the nematic electronic state in FeSe
• Lifting of xz/yz orbital degeneracy at the structural transition in detwinned FeSe
• The key ingredients of the electronic structure of FeSe
• Suppression of electronic correlations by chemical pressure from FeSe to FeS
• NMR evidence for static local nematicity and its cooperative interplay with low-energy magnetic fluctuations in FeSe under pressure

Cited by in corpus (6)

• Separate tuning of nematicity and spin fluctuations to unravel the origin of superconductivity in FeSe
• Impact of Nematicity on the Relationship between Antiferromagnetic Fluctuations and Superconductivity in FeSe0.91S0.09 Under Pressure
• Pressure-induced reconstitution of Fermi surfaces and spin fluctuations in S-substituted FeSe
• Spin fluctuations from Bogoliubov Fermi surfaces in the superconducting state of S-substituted FeSe
• Interrelationships between nematicity, antiferromagnetic spin fluctuations and superconductivity: Role of hotspots in FeSe${}_{1-x}$S${}_x$ revealed by high pressure ${}^{77}$Se NMR study
• Crossover of Superconductivity across the antiferromagnetic end point in FeSe${}_{1-\mathrm{x}}$S${}_{\mathrm{x}}$ under pressure