Inelastic neutron scattering study of the resonance mode in the optimally doped pnictide superconductor LaFeAsO0.92F0.08
Shin-ichi Shamoto, Motoyuki Ishikado, Andrew D. Christianson, Mark D. Lumsden, Shuichi Wakimoto, Katsuaki Kodama, Akira Iyo, Masatoshi Arai
DOI 10.1103/PhysRevB.82.172508 · Physical Review B
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Abstract
An optimally doped iron-based superconductor LaFeAsO0.92F0.08 with Tc=29 K has been studied by inelastic powder neutron scattering. The magnetic excitation at Q=1.15 Å−1 is enhanced below Tc, leading to a peak at Eres∼13 meV as the resonance mode, in addition to the formation of a gap at low energy below the crossover energy Δc∼10 meV. The peak energy at Q=1.15 Å−1 corresponds to 5.2kBTc in good agreement with the other values of resonance mode observed in iron-based superconductors. Although the phonon density of states has a peak at the same energy as the resonance mode in the present superconductor, the Q dependence is consistent with the resonance being of predominately magnetic origin.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaFeAsO0.92F0.08 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 29 | Pressure not reported | unknown |
| LaFeAsO0.92F0.08 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 29 | Pressure not reported | unknown |
| Ba0.6K0.4Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba(Fe1-xCox)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| BaFe1.9Ni0.1As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| FeTe1-xSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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