Effect of pressure on the neutron spin resonance in the unconventional superconductor FeTe0.6Se0.4
K. Marty, A. D. Christianson, A. M. dos Santos, B. Sipos, K. Matsubayashi, Y. Uwatoko, J. A. Fernandez-Baca, C. A. Tulk, T. A. Maier, B. C. Sales, M. D. Lumsden
DOI 10.1103/PhysRevB.86.220509 · Physical Review B
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Abstract
We have carried out a pressure study of the unconventional superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering, resistivity, and magnetic susceptibility measurements. The neutron spin resonance energy and the superconducting transition temperature have been extracted as a function of applied pressure in samples obtained from the same crystal. Both increase with pressure up to a maximum at ≈1.3 GPa, directly demonstrating a correlation between these two fundamental parameters of unconventional superconductivity. A comparison between the quantitative evolution of Tc and the resonance energy as a function of applied pressure is also discussed. These measurements serve to demonstrate the feasibility of using pressure dependent inelastic neutron scattering to explore the relationship between the resonance energy and Tc in unconventional superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| FeTe0.6Se0.4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | unknown |
| FeTe0.6Se0.4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13.6 | Pressure unresolved | onset |
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