摘要
应用晶格动力学 ,结合分析型EAM模型 ,计算了Ag(1 1 0 )表面声子频率和振动极化方向 ,通过比较弛豫与未弛豫表面的计算结果 ,发现弛豫后的结果与He原子散射实验数据符合得很好 ,表面振动的极化局域特征符合表面的二维对称性 ,沿 Γ Y方向的S2 和S3表面模也和实验结果—致 .
The surface phonons on Ag(110)are studied in the present paper by means of the lattice dynamics and an analytic embedded atom method(EAM). The phonon frequencies and disperse curves with surface relaxation are in good agreement with the data obtained by the helium atom scattering experiments. The polarization and localization of surface vibration are in accord with the two dimensional symmetry in the surface. The S 2 and S 3 surface modes along direction are predicted, which are in agreement with the helium atom scattering experiments.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第6期1946-1951,共6页
Acta Physica Sinica
基金
教育部跨世纪优秀人才培养计划 (批准号 :2 0 0 114 4)资助的课题~~
