Photoinduced melting of a stripe-type charge-order and metallic domain formation in a layered BEDT-TTF-based organic salt

S. Iwai, K. Yamamoto, A. Kashiwazaki, F. Hiramatsu, H. Nakaya, Y. Kawakami, K. Yakushi, H. Okamoto, H. Mori, Y. Nishio

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133 Citations (Scopus)

Abstract

Photoinduced melting of charge-order (CO) in [bis(ethylenedithiolo)]- tetrathiafulvalene (BEDT-TTF) salts was investigated by femotosecond spectroscopy. Comparative studies on two polytypes exhibiting large [θ-(BEDT-TTF)2RbZn(SCN)4] and small [α-(BEDT-TTF)2I3] molecular rearrangements through the CO transition were performed. Ultrafast melting of CO for both compounds demonstrates the major contribution of the electronic instability which is due to Coulomb interaction. The roles of the molecular rearrangements on the formation of the CO and the metallic domain are discussed on the basis of low-frequency lattice dynamics.

Original languageEnglish
Article number097402
JournalPhysical review letters
Volume98
Issue number9
DOIs
Publication statusPublished - 2007 Mar 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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