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本文提出了一个以本征势和过冷势概念为基础的散射理论,研究d电子态的态密度变化。它显示散射共振或E~(-1/2)特征以屏蔽过冷势本身,这样的态密度变化正是能带的粒子数反转。立方对称的变形兮裂了此反转态,由于占据较低的导带而获得的能量就引起了软模、驱动了相变。这是特殊的Jahn-Teller效应,它包含定域—离域跃迁,这跃迁可以采用和黄昆的多声子无辐射跃迁理论以及Johansson的铈的Y—α相变理论等类似的观点来讨论。以此Jahn—Teller效应为基础的动力学方程导出的D因子可给出此分裂对弹性常数的贡献。并对铁合金和β—钨结构化合物作出了定量估算。
In this paper, we propose a scattering theory based on the concepts of eigenvalues and subcooling potentials to study the changes in the density of states of d electronic states. It shows the scattering resonance or E ~ (-1/2) feature to shield the supercooling itself, and this change in density of states is exactly the inversion of the number of bands in the band. Symmetrical cubic deformations break this inverted state, and the energy gained by taking up the lower conduction band causes the soft mode, which drives the phase transition. This is a special Jahn-Teller effect, which contains a localized-delocalized transition that can be discussed in terms of a similar phonon nonradiative transition theory of Huang Kun and the Y-α phase transition theory of Johansson’s cerium . The D factor derived from the kinetic equation based on this Jahn-Teller effect gives the contribution of this split to the elastic constant. A quantitative estimation of ferroalloy and β-tungsten structure compounds was also made.