تقرير
Dispersions of Many-Body Bethe strings
| العنوان: | Dispersions of Many-Body Bethe strings |
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| المؤلفون: | Bera, Anup Kumar, Wu, Jianda, Yang, Wang, Wang, Zhe, Bewley, Robert, Boehm, Martin, Bartkowiak, Maciej, Prokhnenko, Oleksandr, Klemke, Bastian, Islam, A. T. M. Nazmul, Law, Joseph Mathew, Lake, Bella |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Complex bound states of magnetic excitations, known as Bethe string, were predicted almost a century ago to exist in one-dimensional quantum magnets 1. The dispersions of the string states have so far remained the subject of intensive theoretical studies 2-7. By performing neutron scattering experiments on the one-dimensional Heisenberg-Ising antiferromagnet SrCo2V2O8 in high longitudinal magnetic fields, we reveal in detail the dispersion relations of the string states over the full Brillouin zone, as well as their magnetic field dependences. Furthermore the characteristic energy, the scattering intensity and linewidth of the observed string states exhibit excellent agreement with our precise Bethe Ansatz calculations. Our results establish the important role of string states in the quantum spin dynamics of one-dimensional systems, and will invoke studies of their dynamical properties in more general many-body systems. Comment: Main manuscript: 6 pages, 4 figures, Supplementary information: 8 pages, 6 figures, 1 table |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1038/s41567-020-0835-7 |
| URL الوصول: | http://arxiv.org/abs/1909.00146 |
| رقم الأكسشن: | edsarx.1909.00146 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1038/s41567-020-0835-7 |
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