تقرير
Confinement of fractional excitations in a triangular lattice antiferromagnet
| العنوان: | Confinement of fractional excitations in a triangular lattice antiferromagnet |
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| المؤلفون: | Facheris, L., Nabi, S. D., Moshe, A. Glezer, Nagel, U., Rõõm, T., Povarov, K. Yu., Stewart, J. R., Yan, Z., Zheludev, A. |
| المصدر: | Phys. Rev. Lett. 130, 256702 (2023) |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | High-resolution neutron and THz spectroscopies are used to study the magnetic excitation spectrum of Cs$_2$CoBr$_4$, a distorted-triangular-lattice antiferromagnet with nearly XY-type anisotropy. What was previously thought of as a broad excitation continuum [Phys. Rev. Lett. 129, 087201 (2022)] is shown to be a series of dispersive bound states reminiscent of "Zeeman ladders" in quasi-one-dimensional Ising systems. At wave vectors where inter-chain interactions cancel at the Mean Field level, they can indeed be interpreted as bound finite-width kinks in individual chains. Elsewhere in the Brillouin zone their true two-dimensional structure and propagation are revealed. Comment: 11 pages, 8 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.130.256702 |
| URL الوصول: | http://arxiv.org/abs/2301.13596 |
| رقم الأكسشن: | edsarx.2301.13596 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.130.256702 |
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