Multi-spinon and antiholon excitations probed by resonant inelastic x-ray scattering on doped one-dimensional antiferromagnets
Multi-spinon and antiholon excitations probed by resonant inelastic x-ray scattering on doped one-dimensional antiferromagnets
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DOI：
10.1088/1367-2630/aad00a
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发表时间：
2018-07-11
影响因子：
3.3
通讯作者：
Johnston, Steve
中科院分区：
文献类型：
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作者：
Kumar, Umesh;Nocera, Alberto;Johnston, Steve
共振非弹性X射线散射（RIXS）在氧K-边缘最近访问多自旋激发在一维反铁磁体（1D-AFM）Sr 2CuO 3，其中四自旋激发从两个自旋连续分别解决。因此，这项技术提供了新的机会，研究在掺杂的一维原子力显微镜的分形准粒子激发。为此，我们进行了精确的对角化研究的掺杂t-J模型，并提供预测的氧K边RIXS实验掺杂的一维原子力显微镜。我们发现，RIXS光谱是丰富的，包含不同的两个和四个自旋子激发，色散反荷子激发，以及它们的组合。我们的研究结果突出了RIXS如何补充非弹性中子散射实验通过访问额外的电荷和自旋分量的分馏准粒子。
Resonant inelastic x-ray scattering (RIXS) at the oxygen K-edge has recently accessed multi-spinon excitations in the one-dimensional antiferromagnet (1D-AFM) Sr2CuO3, where four-spinon excitations are resolved separately from the two-spinon continuum. This technique, therefore, provides new opportunities to study fractionalized quasiparticle excitations in doped 1D-AFMs. To this end, we carried out exact diagonalization studies of the doped t-J model and provided predictions for oxygen K-edge RIXS experiments on doped 1D-AFMs. We show that the RIXS spectra are rich, containing distinct two- and four-spinon excitations, dispersive antiholon excitations, and combinations thereof. Our results highlight how RIXS complements inelastic neutron scattering experiments by accessing additional charge and spin components of fractionalized quasiparticles.