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| 001 | 904645 | ||
| 005 | 20250129094331.0 | ||
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| 100 | 1 | _ | |a Ran, Kejing |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a Evidence for Magnetic Fractional Excitations in a Kitaev Quantum-Spin-Liquid Candidate α-RuCl3 |
| 260 | _ | _ | |a Bristol |c 2022 |b IOP Publ. |
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| 520 | _ | _ | |a It is known that 𝛼-RuCl3 has been studied extensively because of its proximity to the Kitaev quantum-spin-liquid(QSL) phase and the possibility of approaching it by tuning the competing interactions. Here we present the firstpolarized inelastic neutron scattering study on 𝛼-RuCl3 single crystals to explore the scattering continuum aroundthe 𝛤 point at the Brillouin zone center, which was hypothesized to be resulting from the Kitaev QSL state butwithout concrete evidence. With polarization analyses, we find that, while the spin-wave excitations around the𝑀 point vanish above the transition temperature 𝑇N, the pure magnetic continuous excitations around the 𝛤point are robust against temperature. Furthermore, by calculating the dynamical spin-spin correlation functionusing the cluster perturbation theory, we derive magnetic dispersion spectra based on the 𝐾–𝛤 model, whichinvolves with a ferromagnetic Kitaev interaction of −7.2meV and an off-diagonal interaction of 5.6 meV. We findthis model can reproduce not only the spin-wave excitation spectra around the 𝑀 point, but also the non-spinwavecontinuous magnetic excitations around the 𝛤 point. These results provide evidence for the existence offractional excitations around the 𝛤 point originating from the Kitaev QSL state, and further support the validityof the 𝐾–𝛤 model as the effective minimal spin model to describe 𝛼-RuCl3. |
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| 700 | 1 | _ | |a Wang, Jinghui |0 P:(DE-HGF)0 |b 1 |
| 700 | 1 | _ | |a Bao, Song |0 P:(DE-HGF)0 |b 2 |
| 700 | 1 | _ | |a Cai, Zhengwei |0 P:(DE-HGF)0 |b 3 |
| 700 | 1 | _ | |a Shangguan, Yanyan |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Ma, Zhen |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Wang, Wei |0 P:(DE-HGF)0 |b 6 |
| 700 | 1 | _ | |a Dong, Zhao-Yang |0 P:(DE-HGF)0 |b 7 |
| 700 | 1 | _ | |a Cermak, P. |0 P:(DE-Juel1)159141 |b 8 |
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| 700 | 1 | _ | |a Yu, Shun-Li |0 P:(DE-HGF)0 |b 12 |
| 700 | 1 | _ | |a Li, Jian-Xin |b 13 |
| 700 | 1 | _ | |a Wen, Jinsheng |0 P:(DE-HGF)0 |b 14 |e Corresponding author |
| 773 | _ | _ | |a 10.1088/0256-307X/39/2/027501 |0 PERI:(DE-600)2040565-0 |p 027501 |t Chinese physics letters |v 39 |y 2022 |x 0256-307X |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/904645/files/Evidence%20for%20Magnetic%20Fractional%20Excitations%20in%20a%20Kitaev%20Quantum-Spin-Liquid%20Candidate%20%24alpha%24-RuCl%24_3%24%28Mobile%29.pdf |y Restricted |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/904645/files/schneidewind_ruclpolarizedCPL1216.pdf |y OpenAccess |
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