Nature of Magnetic Excitations in the High-Field Phase of α−RuCl3
| Autor: | P. Lampen-Kelley, Arnab Banerjee, Craig A. Bridges, S. E. Nagler, Jiaqiang Yan, Sergei Zvyagin, L. Zviagina, J. Wosnitza, Alexey Ponomaryov, D. G. Mandrus |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Condensed matter physics Magnon General Physics and Astronomy 01 natural sciences law.invention Magnetic field Honeycomb structure law Phase (matter) 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Neutron 010306 general physics Electron paramagnetic resonance Critical field Excitation |
| Zdroj: | Physical Review Letters. 125 |
| ISSN: | 1079-7114 0031-9007 |
| Popis: | We present comprehensive electron spin resonance (ESR) studies of in-plane oriented single crystals of α-RuCl_{3}, a quasi-two-dimensional material with honeycomb structure, focusing on its high-field spin dynamics. The measurements were performed in magnetic fields up to 16 T, applied along the [110] and [100] directions. Several ESR modes were detected. Combining our findings with recent inelastic neutron- and Raman-scattering data, we identified most of the observed excitations. Most importantly, we show that the low-temperature ESR response beyond the boundary of the magnetically ordered region is dominated by single- and two-particle processes with magnons as elementary excitations. The peculiarities of the excitation spectrum in the vicinity of the critical field are discussed. |
| Databáze: | OpenAIRE |
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