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- W2765709590 abstract "We study the effects of quantum fluctuations on the dynamical generation of a gap and on the evolution of the spin-wave spectra of a frustrated magnet on a triangular lattice with bond-dependent Ising couplings, analog of the Kitaev honeycomb model. The quantum fluctuations lift the subextensive degeneracy of the classical ground-state manifold by a quantum order-by-disorder mechanism. Nearest-neighbor chains remain decoupled and the surviving discrete degeneracy of the ground state is protected by a hidden model symmetry. We show how the four-spin interaction, emergent from the fluctuations, generates a spin gap shifting the nodal lines of the linear spin-wave spectrum to finite energies." @default.
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- W2765709590 date "2018-05-01" @default.
- W2765709590 modified "2023-09-28" @default.
- W2765709590 title "Quantum gap and spin-wave excitations in the Kitaev model on a triangular lattice" @default.
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- W2765709590 doi "https://doi.org/10.1016/j.physb.2017.10.024" @default.
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