Abstract
The neutral-ionic phase transition m quasi-one-dimensional mixed-stack charge-transfer organic complexes is a good example of high tunability and extreme co-operativity between non-linear electronic-structural excitations. This phase transition proceeds via a cascade of co-operative phenomena : in first step the formation of lattice-relaxed charge-transfer multi-excitons and in the second step their three-dimensional condensation and ordering. This is at the origin of singular (P, T) phase diagrams and new physical properties. In this paper, we present a brief overview of this unusual behaviour based on an unified physical picture and illustrated by recent high pressure studies.
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Cailleau, H. et al. (2001). Pressure Tuning of Condensation and Ordering of Charge-Transfer Strings. In: Hochheimer, H.D., Kuchta, B., Dorhout, P.K., Yarger, J.L. (eds) Frontiers of High Pressure Research II: Application of High Pressure to Low-Dimensional Novel Electronic Materials. NATO Science Series, vol 48. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0520-3_13
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DOI: https://doi.org/10.1007/978-94-010-0520-3_13
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