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- W3100332611 endingPage "57001" @default.
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- W3100332611 abstract "We investigate the spin dynamics of the square-lattice spin-1/2 Heisenberg antiferromagnet by means of an improved mean field Schwinger boson calculation. By identifying both, the long range N'eel and the RVB-like components of the ground state, we propose an educated guess for the mean field triplet excitation consisting on a linear combination of local and bond spin flips to compute the dynamical structure factor. Our main result is that when this triplet excitation is optimized in such a way that the corresponding sum rule is fulfilled, we recover the low and high energy spectral weight features of the experimental spectrum. In particular, the anomalous spectral weight depletion at $(pi,0)$ found in recent inelastic neutron scattering experiments can be attributed to the interference of the triplet bond excitations of the RVB component of the ground state. We conclude that the Schwinger boson theory seems to be a good candidate to adequately interpret the dynamic properties of the square-lattice Heisenberg antiferromagnet." @default.
- W3100332611 created "2020-11-23" @default.
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- W3100332611 date "2016-03-01" @default.
- W3100332611 modified "2023-10-18" @default.
- W3100332611 title "RVB signatures in the spin dynamics of the square-lattice Heisenberg antiferromagnet" @default.
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- W3100332611 doi "https://doi.org/10.1209/0295-5075/113/57001" @default.
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