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      Mutually attracting spin waves in the square-lattice quantum antiferromagnet

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      SciPost Physics
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          Abstract

          Spin waves (magnons) in two dimensions are the potential glue in high-temperature superconductors so that their quantitative understanding is mandatory. Yet even for the fundamental case of the undoped Heisenberg model on the square lattice a consistent picture is still lacking. Significant spectral continua are taken as evidence of the existence of fractional excitations (spinons), but descriptions in terms of spinons fail to show the established absence of an energy gap. Here a fully consistent picture of the dynamics in the square-lattice quantum antiferromagnet is provided which agrees with the experimental findings. The key step is to capture (i) the strong attractive interaction between the spin waves and (ii) the vertex corrections of the observables.

          Most cited references56

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          Field Dependence of the Intrinsic Domain Magnetization of a Ferromagnet

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            The spin-½ Heisenberg antiferromagnet on a square lattice and its application to the cuprous oxides

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              Broken Symmetries

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                Author and article information

                Journal
                SciPost Physics
                SciPost Phys.
                Stichting SciPost
                2542-4653
                2018
                January 17 2018
                : 4
                : 1
                Affiliations
                [1 ]Technical University of Dortmund
                [2 ]University of Erlangen-Nuremberg
                Article
                10.21468/SciPostPhys.4.1.001
                ffea4fe6-5b52-402e-a4e7-58b70c5989eb
                © 2018

                This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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                Physics
                Physics

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