Dynamics of Topological Excitations in a Model Quantum Spin Ice

Abstract

We study the quantum spin dynamics of a frustrated XXZ model on a pyrochlore lattice by using large-scale quantum Monte Carlo simulation and stochastic analytic continuation. In the low-temperature quantum spin ice regime, we observe signatures of coherent photon and spinon excitations in the dynamic spin structure factor. As the temperature rises to the classical spin ice regime, the photon disappears from the dynamic spin structure factor, whereas the dynamics of the spinon remain coherent in a broad temperature window. Our results provide experimentally relevant, quantitative information for the ongoing pursuit of quantum spin ice materials.

10 pages, 5 figures

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• Symmetry fractionalization in the gauge mean-field theory of quantum spin ice
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• Finite Temperature Dynamics in 0-Flux and $\pi$-Flux Quantum Spin Ice: Self-Consistent Exclusive Boson Approach
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• Two-Peak Heat Capacity Accounts for $R\ln (2)$ Entropy and Ground State Access in the Dipole-Octupole Pyrochlore Ce${}_2$Hf${}_2$O${}_7$
• Field-temperature phase diagram of the enigmatic Nd${}_2$(Zr${}_{1-x}$Ti${}_x$)${}_2$O${}_7$ pyrochlore magnets
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• Magnetic Field Response of Dipolar-Octupolar Quantum Spin Ice
• Flux roughening in spin ice with mixed $\pm J$ interactions
• Quantum Spin Liquids in Pyrochlore Magnets With Non-Kramers Local Moments
• Coupling quantum spin ice to matter on the centered pyrochlore lattice
• Towards a global phase diagram of Ce-based dipolar-octupolar pyrochlore magnets under magnetic fields
• Doped resonating-valence-bond states: Robustness of the spin-ice phases in three-dimensional Rydberg arrays
• Universal collective Larmor-Silin mode emerging in magnetized correlated Dirac fermions