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- W2044319174 abstract "A model of disordered spin-Peierls system is considered, where domain walls are randomly distributed as a telegraph noise. For this realization of the disorder in an XX spin chain, we calculate exactly the density of states as well as several thermodynamic quantities. The resulting physical behavior should be qualitatively unchanged even for an XXZ chain, up to the isotropic XXX point. For weak disorder, besides a high energy regime where the behavior of a pure spin-Peierls system is recovered, there is a crossover to a low energy regime with singular thermodynamic properties and enhanced antiferromagnetic fluctuations. These regimes are analyzed with the help of exact results, and the relevant energy scales determined. We discuss the possible relevance of such a disorder realization to the doped inorganic spin-Peierls compound ${mathrm{CuGeO}}_{3}$." @default.
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- W2044319174 title "Coexistence of Antiferromagnetism and Dimerization in a Disordered Spin-Peierls Model: Exact Results" @default.
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- W2044319174 doi "https://doi.org/10.1103/physrevlett.78.3382" @default.
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