Resonant Raman scattering theory for Kitaev models and their Majorana fermion boundary modes

Abstract

We study the inelastic light scattering response in two- (2D) and three-dimensional (3D) Kitaev spin-liquid models with \ms band structures in the symmetry classes BDI and D leading to protected gapless surface modes. We present a detailed calculation of the resonant Raman/Brillouin scattering vertex relevant to iridate and ruthenate compounds whose low-energy physics is believed to be proximate to these spin-liquid phases. In the symmetry class BDI, we find that while the resonant scattering on thin films can detect the gapless boundary modes of spin liquids, the non-resonant processes do not couple to them. For the symmetry class D, however, we find that the coupling between both types of light-scattering processes and the low-energy surface states is strongly suppressed. Additionally, we describe the effect of weak time-reversal symmetry breaking perturbations on the bulk Raman response of these systems.

23 pages, 20 figures, 4 appendices, 2 ancillary files

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Cited by in corpus (23)

• Models and Materials for Generalized Kitaev Magnetism
• A Field Guide to Spin Liquids
• Physics of the Kitaev model: fractionalization, dynamical correlations, and material connections
• Dynamics of a quantum spin liquid beyond integrability $-$ the Kitaev-Heisenberg-$\Gamma$ model in an augmented parton mean-field theory
• Destabilization of magnetic order in a dilute Kitaev spin liquid candidate
• Polarization-resolved Raman spectroscopy of α-RuCl3 and evidence of room temperature two-dimensional magnetic scattering
• Spin dynamics in the Kitaev model with disorder: Quantum Monte Carlo study of dynamical spin structure factor, magnetic susceptibility, and NMR relaxation rate
• Probing spinon nodal structures in three-dimensional Kitaev spin liquids
• Observing spin fractionalization in the Kitaev spin liquid via temperature evolution of indirect resonant inelastic x-ray scattering
• Temperature evolution of the phonon dynamics in the Kitaev spin liquid
• Dynamics of a two-dimensional quantum spin-orbital liquid: spectroscopic signatures of fermionic magnons
• Further insights into the thermodynamics of the Kitaev honeycomb model
• Majorana Landau Level Raman Spectroscopy
• Thermally induced metallic phase in a gapped quantum spin liquid - a Monte Carlo study of the Kitaev model with parity projection
• Footprints of the Kitaev spin liquid in the Fano lineshapes of the Raman active optical phonons
• Fingerprints of quantum spin ice in Raman scattering
• Nonlinear response of the Kitaev honeycomb lattice model in a weak magnetic field
• Phonon Dynamics in the Generalized Kitaev Spin Liquid
• Raman Scattering Polarization and Single Spinon Identification in Two-Dimensional Kitaev Quantum Spin Liquids
• Projective-symmetry-group analysis of inelastic light scattering in Kitaev spin balls
• Sound attenuation in the hyperhoneycomb Kitaev spin liquid
• A perspective on inelastic light scattering spectroscopy for probing transport of collective acoustic excitations
• Non-Loudon-Fleury Raman scattering in spin-orbit coupled Mott insulators