Fingerprints of quantum spin ice in Raman scattering

Abstract

We develop a theory of the dynamical response of a minimal model of quantum spin ice (QSI) by means of inelastic light scattering. In particular, we are interested in the Raman response of the fractionalized U(1) spin liquid realized in the XXZ QSI. We show that the low-energy Raman intensity is dominated by spinon and gauge fluctuations. We find that the Raman response in the QSI state of that model appears only in the $T_{2g}$ polarization channel. We show that the Raman intensity profile displays a broad continuum from the spinons and coupled spinon and gauge fluctuations, and a low-energy peak arising entirely from gauge fluctuations. Both features originate from the exotic interaction between photon and the fractionalized excitations of QSI. Our theoretical results suggest that inelastic Raman scattering can in principle serve as a promising experimental probe of the nature of a U(1) spin liquid in QSI.

16 pages, 4 figures

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Cited by in corpus (12)

• Frustrated quantum rare-earth pyrochlores
• Quantum and Classical Phases of the Pyrochlore Heisenberg Model with Competing Interactions
• Raman evidence for dimerization and Mott collapse in $\alpha$-RuCl${}_3$ under pressures
• The Spectral Periodicity of Spinon Continuum in Quantum Spin Ice
• Dirac's "magnetic monopole" in pyrochlore ice U(1) spin liquids: Spectrum and classification
• Competing phases and topological excitations of spin-one pyrochlore antiferromagnets
• Footprints of the Kitaev spin liquid in the Fano lineshapes of the Raman active optical phonons
• Electric field control of emergent electrodynamics in quantum spin ice
• Finite Temperature Dynamics in 0-Flux and $\pi$-Flux Quantum Spin Ice: Self-Consistent Exclusive Boson Approach
• Properties and application of the SO(3) Majorana representation of spin: equivalence with the Jordan-Wigner transformation and exact $Z_2$ gauge theories for spin models
• Probing emergent QED in quantum spin ice via Raman scattering of phonons: shallow inelastic scattering and pair production
• Non-Loudon-Fleury Raman scattering in spin-orbit coupled Mott insulators