Publication Date:
2003-04-26
Description:
We report the direct observation by x-ray diffraction of a photoinduced paraelectric-to-ferroelectric structural phase transition using monochromatic 100-picosecond synchrotron pulses. It occurs in tetrathiafulvalene-p-chloranil, a charge-transfer molecular material in which electronic and structural changes are strongly coupled. An optical 300-femtosecond laser pulse switches the material from a neutral to an ionic state on a 500-picosecond time scale and, by virtue of intrinsic cooperativity, generates self-organized long-range structural order. The x-ray data indicate a macroscopic ferroelectric reorganization after the laser irradiation. Refinement of the structures before and after laser irradiation indicates structural changes at the molecular level.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Collet, Eric -- Lemee-Cailleau, Marie-Helene -- Buron-Le Cointe, Marylise -- Cailleau, Herve -- Wulff, Michael -- Luty, Tadeusz -- Koshihara, Shin-Ya -- Meyer, Mathias -- Toupet, Loic -- Rabiller, Philippe -- Techert, Simone -- New York, N.Y. -- Science. 2003 Apr 25;300(5619):612-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Groupe Matiere Condensee et Materiaux, UMR CNRS 6626, Universite Rennes 1, 35042 Rennes Cedex, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12714737" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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