Antiferromagnetic Resonance and Terahertz Continuum in α-RuCl<sub>3</sub>
ORAL
Abstract
We report time-domain THz spectroscopy measurements of α-RuCl3 as a function of temperature and applied in-plane magnetic field, H, in the energy range 0.3 to 8.3 meV. Polarized measurements show that at zero field, 3-fold rotational symmetry is broken in the honeycomb plane from 2 K to 300 K. Below TN, and with B(t) parallel H, we observe an antiferromagnetic resonance (AFMR) peak at 2.56 meV atop a large broadband continuum which can attributed largely to electric dipole absorption. We track the evolution of the AMFR peak from H = 0 T to 7 T as it broadens and shifts to lower frequency. From spectral weight analysis of this peak, we place an upper bound on the contribution to the dc susceptibility from a magnetic excitation continuum. Ref. arxiv:1704.07357
*Terahertz spectroscopy was performed at Lawrence Berkeley National Laboratory in the Spin Physics program supported by the Director, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, of the U.S. Department of Energy under Contract No. DE-AC02-76SF00515. This
–
Presenters
Arielle Little
Univ of California - Berkeley
Authors
Arielle Little
Univ of California - Berkeley
Liang Wu
Univ of California - Berkeley
Paula Lampen-Kelley
Oak Ridge National Lab
Oak Ridge National Laboratory
Arnab Banerjee
Quantum Condensed Matter Division, Oak Ridge National Laboratory
Oak Ridge National Lab
Oak Ridge National Laboratory
Shreyas Patankar
Physics, Univ of California - Berkeley
Univ of California - Berkeley
Physics, University of California, Berkeley
Dylan Rees
Univ of California - Berkeley
Craig Bridges
Oak Ridge National Lab
Oak Ridge National Laboratory
Jiaqiang Yan
Materials Science and Technology Division, Oak Ridge National Laboratory
Oak Ridge National Lab
Oak Ridge National Laboratory
Ames Laboratory, Iowa State University
David Mandrus
Department of Materials Science and Engineering, The University of Tennessee
Oak Ridge National Lab
Oak Ridge National Laboratory
Department of Materials Science and Engineering, University of Tennessee
University of Tennessee
Materials Science and Technology, Oak Ridge National Laboratory
Materials Science and Engineering, The University of Tennessee
Materials Science and Engineering, University of Tennessee
Material Science and Technology Division, Oak Ridge National Laboratory
Oakridge National Laboratory
University of Tennessee, Knoxville
Univ of Tennessee, Knoxville
Stephen Nagler
Quantum Condensed Matter Division, Oak Ridge National Laboratory
Oak Ridge National Lab
Oak Ridge National Laboratory
Neutron Scattering Division, Oak Ridge National Laboratory
