Determination of the na/cu(001) potential energy surface from helium scattering studies of the surface dynamics
Determination of the na/cu(001) potential energy surface from helium scattering studies of the surface dynamics
复制标题
通过表面动力学的氦散射研究确定 na/cu(001) 势能表面
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
S. Ying
中科院分区：
文献类型：
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作者：
A. Graham;F. Hofmann;J. Toennies;Liao Y. Chen;S. Ying
用高分辨率氦原子散射技术研究了低覆盖率sQNa， 5%d的Na原子在Cu（001）表面上的准弹性峰展宽和动动受挫振动。用基于朗之万动力学的理论模型分析了在t - 150 ~ 390k温度下以及沿表面对称方向的大范围平行波矢量的观测行为。理论和实验之间的比较允许一个完整的测定横向吸附电位以及摩擦耦合的Na原子的底物。[s0031 - 9007 (97) 03142 - 6]
The quasielastic peak broadening and the frustrated translational vibrations of a low coverag sQNa , 5%d of Na atoms on a Cu(001) surface have been probed with high resolution helium atom scattering. The observed behavior at temperatures between Ts 150 and 390 K and for a wide range of parallel wave vectors along the surface symmetry directions is analyzed with a theoretica model based upon Langevin dynamics. Comparison between theory and experiment allows a comple determination of the lateral adsorption potential as well as the frictional coupling of the Na atoms to the substrate. [S0031-9007(97)03142-6]