<Research Report>A Variety of Dynamics in Organic Crystals Having Strong Electron-Lattice Interaction

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  • <研究ノート>強い電子格子相互作用をもつ有機結晶の多彩な光誘起ダイナミクス
  • 強い電子格子相互作用をもつ有機結晶の多彩な光誘起ダイナミクス
  • ツヨイ デンシ ゴウシ ソウゴ サヨウ オ モツ ユウキ ケッショウ ノ タサイ ナ ヒカリ ユウキ ダイナミクス

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We studied photoinduced dynamics in an organic crystal (EDO-TTF)[2]PF[6], which has strong electron-electron and electron-lattice interactions, by applying four types of ultrafast techniques. Using 10 fs reflectivity change measurement, we found that a new state emerges over 40 fs. The optical conductivity spectrum at 100 fs from mid-infrared to visible light revealed this state to be a photoinduced phase which has never seen in thermal equilibrium. The crystal and molecular structural changes over I00 ps were studied using picosecond infrared vibrational spectroscopy and femtosecond electron diffraction and it is figured out that molecular deformation is much slower than its translation.

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