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• W4210508780 abstract "Recent experiments on the dipolar-octupolar pyrochlore compound ${mathrm{Ce}}_{2}{mathrm{Zr}}_{2}{mathrm{O}}_{7}$ indicate that it may realize a three-dimensional quantum spin liquid (QSL). In particular, the analyses of available data suggest that the system is in a region of parameter space, where the so-called $ensuremath{pi}$-flux $U(1)$ octupolar quantum spin ice (QSI) with an emergent photon could be realized. However, because the system is far from the perturbative classical spin ice regime, it is unclear whether the quantum ground state is primarily a coherent superposition of 2-in-2-out configurations as in the canonical QSI phases. In this work, we explore other possible competing quantum spin-liquid states beyond QSI using the Schwinger boson parton construction of the dipolar-octupolar pseudospin-1/2 model. After classifying all symmetric $U(1)$ and ${mathbb{Z}}_{2}$ QSLs using the projective symmetry group (PSG), we construct a mean-field phase diagram that possesses a number of important features observed in an earlier exact diagonalization study. In the experimentally relevant frustrated region of the phase diagram, we find two closely competing gapped ${mathbb{Z}}_{2}$ QSLs with a narrow spinon dispersion. The equal-time and dynamical spin structure factors of these states show key features similar to what was reported in neutron scattering experiments. Hence, these QSLs are closely competing ground states in addition to the $ensuremath{pi}$-flux $U(1)$ QSI, and they should be taken into account on equal footing for the interpretation of experiments on ${mathrm{Ce}}_{2}{mathrm{Zr}}_{2}{mathrm{O}}_{7}$." @default.
• W4210508780 created "2022-02-08" @default.
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• W4210508780 date "2022-01-28" @default.
• W4210508780 modified "2023-09-30" @default.
• W4210508780 title "Competing U (1) and Z2 dipolar-octupolar quantum spin liquids on the pyrochlore lattice: Application to Ce2Zr2O7" @default.
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• W4210508780 doi "https://doi.org/10.1103/physrevb.105.035149" @default.
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