The spin-exchange dynamical structure factor of the S=1/2 Heisenberg
| Authors | |
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| Publication date | 2011 |
| Journal | Physical Review Letters |
| Article number | 157205 |
| Volume | Issue number | 106 | 15 |
| Number of pages | 4 |
| Organisations |
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| Abstract |
We determine the spin-exchange dynamical structure factor of the Heisenberg spin chain, as is measured by indirect resonant inelastic x-ray scattering (RIXS). We find that two-spin RIXS excitations nearly entirely fractionalize into two-spinon states. These share the same continuum lower bound as single-spin neutron scattering excitations, even if the relevant final states belong to orthogonal symmetry sectors. The RIXS spectral weight is mainly carried by higher-energy excitations, and is beyond the reach of the low-energy effective theories of Luttinger liquid type. |
| Document type | Article |
| Language | English |
| Published at | https://doi.org/10.1103/PhysRevLett.106.157205 |
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