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dc.contributor.authorMetlitski, Max
dc.contributor.authorSachdev, Subir
dc.date.accessioned2012-01-10T16:37:40Z
dc.date.issued2008
dc.identifier.citationMetlitski, Max, and Subir Sachdev. 2008. Edge and impurity response in two-dimensional quantum antiferromagnets. Physical Review B 78(17): 174410.en_US
dc.identifier.issn1550-235Xen_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:7431917
dc.description.abstractMotivated by recent Monte Carlo simulations of Höglund and Sandvik (arXiv:0808.0408), we study edge response in square lattice quantum antiferromagnets. We use the \(O(3)\) nonlinear σ model to compute the decay asymptotics of the staggered magnetization, energy density, and local magnetic susceptibility away from the edge. We find that the total edge susceptibility is negative and diverges logarithmically as the temperature \(T\rightarrow 0\). We confirm the predictions of the continuum theory by performing a \(1/S\) expansion of the microscopic Heisenberg model with the edge. We propose a qualitative explanation of the edge dimerization seen in Monte Carlo simulations by a theory of valence-bond-solid correlations in the Néel state. We also discuss the extension of the latter theory to the response of a single nonmagnetic impurity, and its connection to the theory of the deconfined critical point.en_US
dc.description.sponsorshipPhysicsen_US
dc.language.isoen_USen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofdoi://10.1103/PhysRevB.78.174410en_US
dc.relation.hasversionhttp://arxiv.org/abs/0808.0496en_US
dash.licenseOAP
dc.subjectstrongly correlated electronsen_US
dc.titleEdge and Impurity Response in Two-Dimensional Quantum Antiferromagnetsen_US
dc.typeJournal Articleen_US
dc.description.versionAuthor's Originalen_US
dc.relation.journalPhysical Review Ben_US
dash.depositing.authorSachdev, Subir
dc.date.available2012-01-10T16:37:40Z
dc.identifier.doi10.1103/PhysRevB.78.174410*
dash.contributor.affiliatedSachdev, Subir


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