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Dynamical Mean-Field Theory of Resonating Valence Bond Antiferromagnets

Antoine Georges·Rahul Siddharthan·Serge Florens
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Abstract

We propose a theory of the spin dynamics of frustrated quantum antiferromagnets, which is based on an effective action for a plaquette embedded in a self-consistent bath. This approach, supplemented by a low-energy projection, is applied to the kagome antiferromagnet. We find that a spin-liquid regime extends to very low energy, in which local correlation functions have a slow decay in time, well described by a power law behaviour and $ω/T$ scaling of the response function: $χ''(ω)\propto ω^{-α}F(ω/T)$.

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BibTeXRIS

Antoine Georges, Rahul Siddharthan, Serge Florens. 2001-10-25. Dynamical Mean-Field Theory of Resonating Valence Bond Antiferromagnets. https://doi.org/10.1103/physrevlett.87.277203

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