Polarized neutron scattering studies of magnetic excitations in iron-selenide superconductor Li0.8Fe0.2ODFeSe (T (c)=41 K) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2021

Polarized neutron scattering studies of magnetic excitations in iron-selenide superconductor Li0.8Fe0.2ODFeSe (T (c)=41 K)

Résumé

We report polarized neutron scattering measurements of the low energy spin fluctuations of the iron-selenide superconductor Li0.8Fe0.2ODFeSe below and above its superconducting transition temperature Tc = 41 K. Our experiments confirmed that the resonance mode near 21 meV is magnetic. Moreover, the spin excitations are essentially isotropic in spin space at 5 ⩽ E ⩽ 29 meV in the superconducting and normal states. Our results suggest that the resonance mode in iron-based superconductors becomes isotropic when the influence of spin–orbit coupling and magnetic/nematic order is minimized, similar to those observed in cuprate superconductors.

Dates et versions

hal-03856057 , version 1 (16-11-2022)

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Citer

Die Hu, Yu Feng, Jitae T Park, Hongliang Wo, Qisi Wang, et al.. Polarized neutron scattering studies of magnetic excitations in iron-selenide superconductor Li0.8Fe0.2ODFeSe (T (c)=41 K). Journal of Physics: Condensed Matter, 2021, 33 (45), pp.45LT01. ⟨10.1088/1361-648x/ac1d16⟩. ⟨hal-03856057⟩
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