Journal
EUROPHYSICS LETTERS
Volume 59, Issue 4, Pages 619-625Publisher
EDP SCIENCES S A
DOI: 10.1209/epl/i2002-00149-4
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We report on high correlation and ordering of multi-electron transfer at neutralionic transformation in quasi-one-dimensional prototype crystal of tetrathiafulvalene-chloranil (TTF-CA). We present experimental evidences that the ordering of lattice-relaxed charge-transfer strings, which are nano-scale objects, occurs under static thermal equilibrium condition and non-equilibrium one achieved by femto-second laser irradiation. We suggest that the transformation is a profound example of self-organized, cooperative electron transfer with tendency for phase separation driven by energetics of inter-chain interaction and ferroelectric ordering.
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