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- W4381490042 abstract "High-temperature superconducting paring is generally believed to be mediated by the magnetic fluctuations that mostly occur within the two-dimensional conducting layers (Cu-O, Fe-As, or Fe-Se) in copper oxides, iron pnictides, iron chalcogenides, etc. Here, on the basis of inelastic neutron scattering measurements on a superconducting iron pnictide ${mathrm{Ca}}_{0.33}{mathrm{Na}}_{0.67}{mathrm{Fe}}_{2}{mathrm{As}}_{2}$, we have discovered a highly three-dimensional spin resonance mode with upward V-shape dispersions both in the $ab$ plane and along the $c$ axis. The superconducting gaps exhibit strong ${k}_{z}$ modulations involved with significant changes on the size of one hole pocket and the density state of the ${d}_{{z}^{2}}$ orbital of Fe. The resonance dispersions don't always seem confined by the total gaps summed on those imperfectly nesting Fermi sheets. It is demonstrated that the $c$-axis dependence of both the resonance energy and its intensity in iron pnictides can be universally scaled with the distance between two adjacent Fe-As layers ($d$), and the ${k}_{z}$ modulation of the gap is also anticorrelated with $d$. These results highlight the role of interlayer coupling in iron-based superconductivity, suggesting that the interlayer pairing may also be driven by magnetic fluctuations under certain spin-orbit couplings." @default.
- W4381490042 created "2023-06-22" @default.
- W4381490042 creator A5005326729 @default.
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- W4381490042 date "2023-06-21" @default.
- W4381490042 modified "2023-10-14" @default.
- W4381490042 title "Interlayer coupling in the superconducting state of iron-based superconductors" @default.
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