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Ultrafast photo-induced metal–insulator transition in 1/4 filled organic crystal (EDO-TTF)2PF6

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, , Citation Matthieu Chollet et al 2005 J. Phys.: Conf. Ser. 21 130 DOI 10.1088/1742-6596/21/1/021

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1 Department of Materials Science, Tokyo Institute of Technology, Japan

2 Groupe Matière Condensée et Matériaux, CNRS, UM Recherche-6626, Université de Rennes 1, France

3 KAST and Japan Science and Technology Agency (JST), Precursory Research for Embryonic Science and Technology (PRESTO), Japan

4 Department of Physics, Tokyo Institute of Technology, Japan

5 Division of Chemistry, Kyoto University, Japan

6 Research Center for Low Temperature and Materials Science, Kyoto University, Japan

7 High Energy Accelerator Research Organization (KEK), Japan

8 JST, Exploratory Research for Advanced Technology (ERATO), Japan

9 Graduate School of Science and Technology, Chiba University, Japan

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1742-6596/21/1/130

Abstract

We report that the 1/4 filled A2B salt (EDO-TTF)2PF6 developed as a candidate for organic superconductor unexpectedly shows highly sensitive and ultra-fast photo-induced phase transition (PIPT) from insulator (I) to metal (M). We show the results of time resolved experiments performed on this crystal. A large reflectivity change in the near infrared region (1.2–2 eV), which occurs within 2 ps for weak excitation intensity, has been observed. We also observed coherent vibrations in the dynamical process of this transition.

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10.1088/1742-6596/21/1/021