Raman Scattering and Fundamental Absorption in Red-HgI_2 under Hydrostatic Pressure

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概要

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• The Raman scattering and optical absorption spectra have been measured underhydrostatic pressure up to 1.67 GPa in the layer compound red-Hgl.. The Ramanspectrum shows that the bending force of Hgl. tetra.hedra is too weak for a layerto vibrate rigidly in the so-called rigid-layer mode. The bending force increasesrapidly with pressure, whereas the van der Waals force remains unchanged.These characteristics originate from the fact that the bond ionicity is extremelyhigh and sensitive to pressure. The fundamental absorption edges exhibit redshifts, giving an evidence that the ionicity decreases with pressure. Anisotropyin elastic constants is also discussed in relation to the nature of chemical bondings.

• 社団法人日本物理学会の論文
• 1983-07-15

著者

• Kuroda Noritaka

  The Research Institute For Iron Steel And Other Metals Tohoku University

• NISHINA Yuichiro

  The Research Institute for Iron,Steel and Other Metals,Tohoku University

• IWABUCHI Tatsuro

  The Research Institute for Iron,Steel and Other Metals,Tohoku University

• Nishina Yuichiro

  The Research Institute For Iron Steel And Other Metals

• Iwabuchi Tatsuro

  The Research Institute For Iron Steel And Other Metals Tohoku University:kawasaki Technical Research

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