基于电子-声子相互作用计算了马氏体预相变的临界驱动力. 计算结果表明, 临界相 变驱动力的大小和凝聚声子的能量处于同一数量级. 充分考虑这种相互作用和声子 软化, 得到关于原子位相角的double sine-Gordon方程, 以此分析预相变的非线性 特征, 并认为电子-声子耦合机制可作为预相变的形核机制.
The critical driving force of martensitic pretransition has been calculated based on the Hamiltonian containing electron-phonon interaction. The calculated results shows that the values of the driving force is of the same level as that of the condensed phonon. Considered the electron-phonon interaction and the condensation of TA or LA phonon, the double sine-Gordon equation of atomic phase angle has been proposed to study the nonlinear characteristics of the pretransition and the electron-phonon coupling mechanism may be taken as its main mechanism.
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