Summary
The influence of internal degrees of freedom on the behaviour of one-dimensional systems is discussed. For systems with half-filled bands the coupling to internalviz. lattice coordinates decides whether Peierls distortion is caused by intramonomer coordinates or by a lattice coordinate. Thereby the various intramonomer degrees of freedom act cooperatively. We show that there is a small regime of parameters where both kinds of distortion exist simultaneously. For increasing temperature we find that distortions can also move from the lattice coordinate to the intramonomer coordinate.
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Fischer, F., Köppel, H. & Cederbaum, L.S. Influence of internal degrees of freedom on the structure of one-dimensional systems. Il Nuovo Cimento D 9, 571–579 (1987). https://doi.org/10.1007/BF02667950
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DOI: https://doi.org/10.1007/BF02667950