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摘要翻译：
在准弹性He原子散射实验中，Na原子在Cu(001)上的扩散复盖率达20%时，用相互作用单吸附质近似描述了相互作用表面的活化扩散。这种近似基本上包括求解带有两个噪声源和摩擦的标准朗之万方程：高斯白噪声和白散粒噪声，前者考虑了与基底的摩擦，后者描述了模拟吸附质-吸附质碰撞的碰撞摩擦。在200K和300K两个表面温度下，准弹性峰的展宽与实验数据非常吻合。
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英文标题：
《Stochastic theory of lineshape broadening in quasielastic He atom
scattering with interacting adsorbates》
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作者：
R. Martinez-Casado, J. L. Vega, A. S. Sanz, S. Miret-Artes
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最新提交年份：
2008
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分类信息：
一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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一级分类：Physics 物理学
二级分类：Materials Science 材料科学
分类描述：Techniques, synthesis, characterization, structure. Structural phase transitions, mechanical properties, phonons. Defects, adsorbates, interfaces
技术，合成，表征，结构。结构相变，力学性质，声子。缺陷，吸附质，界面
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一级分类：Physics 物理学
二级分类：Quantum Physics 量子物理学
分类描述：Description coming soon
描述即将到来
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英文摘要：
The activated surface diffusion of interacting adsorbates is described in terms of the so-called interacting single adsorbate approximation, which is applied to the diffusion of Na atoms on Cu(001) for coverages up to 20% in quasielastic He atom scattering experiments. This approximation essentially consists of solving the standard Langevin equation with two noise sources and frictions: a Gaussian white noise accounting for the friction with the substrate, and a white shot noise characterized by a collisional friction simulating the adsorbate-adsorbate collisions. The broadenings undergone by the quasielastic peak are found to be in very good agreement with the experimental data reported at two surface temperatures 200 and 300 K.
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PDF链接：
https://arxiv.org/pdf/710.3266
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