シリコンクラスレート化合物の超高圧ラマン散乱

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  • Raman Studies of Silicon Clathrate Compounds under High Pressure
  • シリコンクラスレート カゴウブツ ノ チョウコウアツ ラマン サンラン

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This article shows the recent Raman studies for type I silicon clathrates doped with Ba, K, and I atoms under high pressure at room temperature. The obtained Raman spectra indicate vibrational signals related with guest atoms encaged in the Si cages in a frequency region lower than 100 cm-1. In order to explore the pressure-induced phase transition, the Raman spectra were measured for the Si clathrates under high pressures using a diamond anvil cell. The spectral changes associated with the phase transition were observed, and the mechanisms of the phase transition were discussed on the basis of the spectral changes.

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