High-field ESR studies of the honeycomb-lattice material 𝛼-RuCl3

High-field ESR studies of the honeycomb-lattice material 𝛼-RuCl3

Ponomaryov, A. N.; Schulze, E.; Wosnitza, J.; Lampen-Kelley, P.; Banerjee, A.; Yan, J. Q.; Bridges, C. A.; Mandrus, D. G.; Nagler, S. E.; Kolezhuk, A. K.; Zvyagin, S.

We present high-field electron spin resonance (ESR) studies of the honeycomb-lattice material 𝛼-RuCl3, a prime candidate to exhibit Kitaev physics. Two modes of antiferromagnetic resonance were detected in the zigzag ordered phase, with magnetic field applied in the 𝑎𝑏 plane. A very rich excitation spectrum was observed in the field-induced Quantum paramagnetic phase. The obtained data are compared with results of recent numerical calculations, strongly suggesting a very unconventional multiparticle character of the spin dynamics in 𝛼-RuCl3. The frequency-field diagram of the lowest-energy ESR mode is found consistent with the behavior of the field-induced energy gap, revealed by thermodynamic measurements. This work was supported by DFG (project ZV 6/2-2).

Involved research facilities

  • High Magnetic Field Laboratory (HLD)
  • Poster
    DPG-Frühjahrstagung der Sektion Kondensierte Materie (SKM) gemeinsam mit der European Physical Society (CMD), 11.-16.03.2018, Berlin, Deutschland

Permalink: https://www.hzdr.de/publications/Publ-28332