Majorana Landau Level Raman Spectroscopy

Abstract

The unambiguous experimental detection of quantum spin liquids and, in particular, of the long-sought Kitaev quantum spin liquid (KQSL) with its Majorana fermion excitations remains an outstanding challenge. One of the major obstacles is the absence of signatures that definitively characterize this phase. Here we propose the Landau levels known to form in the Majorana excitation spectrum of the KQSL when certain strain fields are applied as a direct signature of Majorana fermions with Dirac-like dispersion. In particular, we show that the Majorana Landau level quantization of strained films of the KQSL can be directly probed by Raman spectroscopy. Such experiments are feasible in thin films of $\alpha$-RuCl${}_3$, which are a promising place to search for the KQSL.

6 pages + 3 supplementary, 3+2 Figures

References in corpus (14)

• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• $\alpha$-RuCl3: a Spin-Orbit Assisted Mott Insulator on a Honeycomb Lattice
• Inelastic Light Scattering From Correlated Electrons
• Scattering Continuum and Possible Fractionalized Excitations in $\alpha$-RuCl${}_3$
• Hyper-honeycomb iridate $\beta$-Li2IrO3 as a platform for Kitaev magnetism
• Successive magnetic phase transitions in $\mathbf{\alpha }$-RuCl${}_3$: XY-like frustrated magnet on the honeycomb lattice
• Symmetry-based approach to electron-phonon interactions in graphene
• Na2IrO3 as a spin-orbit-assisted antiferromagnetic insulator with a 340 meV gap
• Vaporization of Kitaev spin liquids
• Exact results for quench dynamics and defect production in a two-dimensional model
• Non-coplanar and counter-rotating incommensurate magnetic order stabilized by Kitaev interactions in $\gamma$-Li2IrO3
• Raman Scattering Signatures of Kitaev Spin Liquids in A${}_2$ IrO${}_3$ Iridates
• Disorder in a quantum spin liquid: flux binding and local moment formation
• Electronic structure of graphene hexagonal flake subjected to triaxial stress

Cited by in corpus (13)

• A Field Guide to Spin Liquids
• Physics of the Kitaev model: fractionalization, dynamical correlations, and material connections
• Hunting Majorana Fermions in Kitaev Magnets
• Dominant Kitaev interactions in the honeycomb materials Na${}_3$Co${}_2$SbO${}_6$ and Na${}_2$Co${}_2$TeO${}_6$
• Pressure-tuned magnetic interactions in honeycomb Kitaev materials
• Twist-induced magnon Landau levels in honeycomb magnets
• Raman Scattering Polarization and Single Spinon Identification in Two-Dimensional Kitaev Quantum Spin Liquids
• Deconfinement of Majorana vortex modes produces a superconducting Landau level
• Pseudo Landau levels, negative strain resistivity, and enhanced thermopower in twisted graphene nanoribbons
• Projective-symmetry-group analysis of inelastic light scattering in Kitaev spin balls
• Gapless state of interacting Majorana fermions in a strain-induced Landau level
• Magnetostriction of α-RuCl3 flakes in the zigzag phase
• Strain-induced Landau levels of Majorana fermions in an anisotropically interacting Kitaev model on a honeycomb lattice