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| Authors | A. Klauser, J. Mossel, J.S. Caux, J. van den Brink | | Title | The Spin-Exchange Dynamical Structure Factor of the S=1/2 Heisenberg Chain |
| Journal | Physical Review Letters |
| Volume | 106 |
| Year | 2011 |
| Pages | 4 |
| ISSN | 00319007 |
| Faculty | Faculty of Science |
| Institute/dept. | FNWI: Institute for Theoretical Physics (ITF) |
| 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 |
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