One-Dimensional Classical Planar Model with Competing Interactions

  • Harada Isao
    Department of Physics, Faculty of Science, Kobe University

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  • One Dimensional Classical Planar Model

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Exact results for the thermodynamic properties of the one-dimensional classical planar model with competing nearest-neighbor and next-nearest-neighbor interactions are presented. The calculations are performed by extending the numerical transfer-matrix method of the nearest-neighbor problem to allow for next-nearest-neighbor interactions. It is found that, for a certain range of values of the competing interactions, the system exhibits helical short-range order whose characteristic wave-number depends on temperature. The nature of the helical short-range order at low temperatures is discussed in connection with a domain wall between domains of opposing chirality of the helical state.

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