论文标题
无定形固体中原子振动的激发
Excitations of Atomic Vibrations in Amorphous Solids
论文作者
论文摘要
我们研究了无定形固体的相互空间中原子振动的激发。我们获得了两种激励，集体激发和局部激发。集体激发是无定形固体中原子的集体振动，而局部激发的局部激发是通过固体中的单个原子振动局部刺激的。 We introduce a continuous wave vector for the study and transform the equations of atomic vibrations from the real space to the reciprocal space.我们以无定形硅为例，并计算相互空间中激发的结构。结果表明，激发是由平面波集组成的波数据包。我们还发现了与纵向振动的集体激发的相互空间中的周期结构，该结构源自无定形固体的真实空间中结构的局部顺序。
We study excitations of atomic vibrations in the reciprocal space for amorphous solids. There are two kinds of excitations we obtained, collective excitation and local excitation. The collective excitation is the collective vibration of atoms in the amorphous solids while the local excitation is stimulated locally by a single atom vibrating in the solids. We introduce a continuous wave vector for the study and transform the equations of atomic vibrations from the real space to the reciprocal space. We take the amorphous silicon as an example and calculate the structures of the excitations in the reciprocal space. Results show that an excitation is a wave packet composed of a collection of plane waves. We also find a periodical structure in the reciprocal space for the collective excitation with longitudinal vibrations, which is originated from the local order of the structure in the real space of the amorphous solid.
