这就是晶体中的声学模。

Actually, they're the acoustic modes of the crystal.

youdao

给出了各晶系晶体一般声学模及高对称方向纯模的散射张量转动修正的确切形式。

The exact rotational correction of the scattering tensor related to general acoustic modes and pure modes in the higher symmetry directions, for different crystal systems, is presented.

youdao

这种声学反常行为可以用均匀弹性应变场与软模坐标涨落的非线性耦合来解释。

The conclusion is that this acoustic anomaly may be interpreted by nonlinear coupling of the elastic strain field to the fluctuation of the soft-mode coordinate.

youdao