Excitations in a thin liquid 4He film from inelastic neutron scattering.
Excitations in a thin liquid 4He film from inelastic neutron scattering.
复制标题
非弹性中子散射在薄液体 4He 薄膜中的激发。
DOI：
10.1103/physrevb.53.12242
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
C. Tymczak
中科院分区：
文献类型：
--
作者：
B. E. Clements;H. Godfrin;E. Krotscheck;E. Krotscheck;H. Lauter;Paul Leiderer;Valeria Passiouk;C. Tymczak
在包括膜的液体层内。分析的结果是一致的模式之间的水平交叉的发生，和存在的层模式的理论预测将在附近的固液界面传播。理论和实验在涟漪子的详细性质上取得了一致;它在低动量时的分散，在中等动量时强度下降，以及在高动量时的能级交叉。与实验相似，理论在Maxon-Roton区产生一个强模，解释为体激发的形成。
within the liquid layers comprising the film. The results of the analysis are consistent with the occurrence of level crossings between modes, and the existence of a layer modes for which the theory predicts will propagate in the vicinity of the solid-liquid interface. The theory and experiment agree on the detailed nature of the ripplon; its dispersion at low momenta, its fall off in intensity at intermediate momenta, and the level crossings at high momentum. Similar to experiment, the theory yields an intense mode in the maxon-roton region which is intrepreted as the formation of the bulklike excitation.