| Authors |
|
| Publication date |
2012
|
| Journal |
Journal of Statistical Mechanics : Theory and Experiment
|
| Article number |
P03012
|
| Volume | Issue number |
2012 | 3
|
| Number of pages |
24
|
| Organisations |
-
Faculty of Science (FNWI) - Institute of Physics (IoP) - Institute for Theoretical Physics Amsterdam (ITFA)
|
| Abstract |
Considering the adjacent spin operators SjzSj + 1z and Sj − Sj + 1 − in the S = 1/2 Heisenberg chain, we give a determinant representation of their form factors. The dynamical structure factors of the respective operators are computed over the whole Brillouin zone in several magnetic fields and the resulting signal is analyzed in terms of excitation types. Among other results, we find that the SjzSj + 1z dynamical structure factor carries a large weight of the four-spinon excitations which are distinguishable from the two-spinon signal because they are located outside the two-spinon spectrum.
|
| Document type |
Article
|
| Language |
English
|
| Published at |
https://doi.org/10.1088/1742-5468/2012/03/P03012
|
|
Permalink to this page
|