拉曼峰强作为分子晶体相变的有序度

The Raman intensity as the order parameter of the phase transition for molecular crystals

本文介绍以拉曼峰强为分子晶体相变有序度的概念，并以ＫＨ＿（１－ｘ）Ｄ＿（ｘ）Ｆ＿２和Ｋ＿（１－ｘ）Ｎａ＿（ｘ）Ｆ＿２为例说明晶格振动模在相变过程中的临界性质可以因此得到。晶格振动模的临界性质反映着掺杂体系的丰富信息。

The concept of Raman intensity as the order parameter of the phase transition for molecular crystals is introduced． With KH_(1-x)D_(x)F_2 and K_(1-x)Na_(x)F_2 as examples，it is shown that many critical properties of lattice modes during phase transition can be elucidated thereby.These，in turn， reflect the ample critical information concerning the doped systems.