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| Hauptseite > Publikationsdatenbank > Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1−xYbxCoIn5 > print |
| Hauptseite > Publikationsdatenbank > Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1−xYbxCoIn5 > print |
| 001 | 819535 | ||
| 005 | 20210129224311.0 | ||
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| 100 | 1 | _ | |a Song, Yu |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1−xYbxCoIn5 |
| 260 | _ | _ | |a London |c 2016 |b Nature Publishing Group |
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| 520 | _ | _ | |a The neutron spin resonance is a collective magnetic excitation that appears in theunconventional copper oxide, iron pnictide and heavy fermion superconductors. Althoughthe resonance is commonly associated with a spin-exciton due to the d(s±)-wave symmetryof the superconducting order parameter, it has also been proposed to be amagnon-like excitation appearing in the superconducting state. Here we use inelastic neutronscattering to demonstrate that the resonance in the heavy fermion superconductorCe1-xYbxCoIn5 with x=0, 0.05 and 0.3 has a ring-like upward dispersion that is robustagainst Yb-doping. By comparing our experimental data with a random phase approximationcalculation using the electronic structure and the momentum dependence of the d(x2 -y2)-wavesuperconducting gap determined from scanning tunnelling microscopy (STM) for CeCoIn5,we conclude that the robust upward-dispersing resonance mode in Ce1-xYbxCoIn5 isinconsistent with the downward dispersion predicted within the spin-exciton scenario. |
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| 700 | 1 | _ | |a Morr, Dirk K. |0 P:(DE-HGF)0 |b 11 |e Corresponding author |
| 700 | 1 | _ | |a Dai, Pengcheng |0 0000-0002-6088-3170 |b 12 |e Corresponding author |
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