• DOI:10.1103/PhysRevLett.125.037202
• Corpus ID: 220042107

Nature of Magnetic Excitations in the High-Field Phase of α-RuCl_{3}.

@article{Ponomaryov2020NatureOM,
  title={Nature of Magnetic Excitations in the High-Field Phase of $\alpha$-RuCl\_\{3\}.},
  author={A. N. Ponomaryov and L A Zviagina and Joachim Wosnitza and Paula Lampen-Kelley and Arnab Banerjee and J.-Q. Yan and Craig A. Bridges and David G. Mandrus and Stephen E. Nagler and Sergei A. Zvyagin},
  journal={Physical review letters},
  year={2020},
  volume={125 3},
  pages={
          037202
        }
}

• A. Ponomaryov, L. Zviagina, +7 authors S. Zvyagin
• Published 24 June 2020
• Physics
• Physical review letters

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.