Models for incommensurate phases in crystals withPcmn symmetry |
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Authors: | T Janssen |
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Institution: | (1) Institute for Theoretical Physics, University of Nijmegen, 6525 ED Nijmegen, The Netherlands |
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Abstract: | A discussion is given of the relation between different models for systems with incommensurate phases. Moreover, a generalisation of such models is introduced, which shows an alternative explanation for similar phase diagrams. To get this one may vary the range of the interactions and the numbers of degrees of freedom per site.Another generalization involves coupling to elastic degrees of freedom. Such a coupling may change the type of the incommensurate phase transition. |
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