This title appears in the Scientific Report :
2022
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevB.106.214522 in citations.
Please use the identifier: http://hdl.handle.net/2128/33550 in citations.
Low-energy spin fluctuations in FeSe 0.95 S 0.05
Low-energy spin fluctuations in FeSe 0.95 S 0.05
We report inelastic neutron scattering measurements of low-energy spin fluctuations in FeSe0.95S0.05 (Tc=10 K). Our experiments revealed a resonance mode at 3.5 meV, accompanied by a spin gap below 3 meV at the stripe wave vector in the superconducting state. The resonance mode is sharp in energy an...
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Personal Name(s): | Hu, Die |
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Wang, Qisi (Corresponding author) / Wo, Hongliang / Schneidewind, Astrid / Zhao, Jun (Corresponding author) | |
Contributing Institute: |
JCNS-4; JCNS-4 Streumethoden; JCNS-2 Heinz Maier-Leibnitz Zentrum; MLZ JCNS-FRM-II; JCNS-FRM-II |
Published in: | Physical review / B, 106 (2022) 21, S. 214522 |
Imprint: |
Woodbury, NY
Inst.
2022
|
DOI: |
10.1103/PhysRevB.106.214522 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) (FZJ) Materials – Quantum, Complex and Functional Materials |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/33550 in citations.
We report inelastic neutron scattering measurements of low-energy spin fluctuations in FeSe0.95S0.05 (Tc=10 K). Our experiments revealed a resonance mode at 3.5 meV, accompanied by a spin gap below 3 meV at the stripe wave vector in the superconducting state. The resonance mode is sharp in energy and appears at an energy level considerably lower than the superconducting gap, implying that the mode is a bound spin exciton below the superconducting gap rather than an enhanced paramagnon. An abrupt enhancement of stripe spin fluctuations is found below a nematic ordering temperature of Ts=80 K. These results indicate that the direct coupling between the stripe spin fluctuations, nematicity, and superconductivity persists in sulfur doped FeSe, where superconductivity is enhanced and nematicity is partially suppressed. |