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Topological Defects and the Spin Glass Phase of Cuprates

N. Hasselmann·A. H. Castro Neto·C. Morais Smith
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Abstract

We propose that the spin glass phase of cuprates is due to the proliferation of topological defects of a spiral distortion of the antiferromagnet order. Our theory explains straightforwardly the simultaneous existence of short range incommensurate magnetic correlations and complete a-b symmetry breaking in this phase. We show via a renormalization group calculation that the collinear O(3)/O(2) symmetry is unstable towards the formation of local non-collinear correlations. A critical disorder strength is identified beyond which topological defects proliferate already at zero temperature.

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N. Hasselmann, A. H. Castro Neto, C. Morais Smith. 2001-12-03. Topological Defects and the Spin Glass Phase of Cuprates. https://doi.org/10.1209/epl%2Fi2001-00600-6

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