2000/05/31 by N. Hasselmann, A. H. Castro Neto, C. Morais Smith · 2 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat.dis-nn #cond-mat.str-el
paper · pdf · doi:10.1209/epl/i2001-00600-6
published as Europhysics Letters, V.56, No.6, 15th December 2001, pp. 870-876 · 7 pages, 2 figures. Final version with some changes and one replaced figure
openalex publication_date 2001/12/01 · arxiv created 2001/12/03 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
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.