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Line group theory of commensurate and incommensurate modulations |
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| Authors: | I Kirschner C Mészáros R Laiho |
| Institution: | Department for Low Temperature Physics, E?tv?s University,, 1088, Budapest, Hungary Department of Physics and Process Control, G?d?ll? University of Agricultural Sciences, 2103, G?d?ll?, Hungary Wihuri Physical Laboratory, University of Turku, 20500, Turku, Finland |
| Abstract: | It is shown that the line group formalism proposed is suitable to describe both commensurate and incommensurate modulations. Symmetry groups of modulated crystal lattices can completely be characterized by symmetry transformations existing in real space, without any application of the formalism based on reciprocal space. As typical examples of the method elaborated, the fundamental invariance and symmetry properties of spin density functions and the soliton lattice are determined. Received: 20 July 1997 / Accepted: 25 August 1997 |
| Keywords: | PACS 02 20 -a Group theory - 64 70 Rh Commensurate-incommensurate transitions - 75 40 Cx Static properties (order parameter static susceptibility heat capacities critical exponents etc ) |
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