吸附物表面扩散：非相干隧穿在轻粒子运动中的作用
Adsorbate surface diffusion: The role of incoherent tunneling in light particle motion
摘要：
研究了非相干隧穿效应在轻原子表面扩散中的作用。为此，Chudley-Elliot主方程约束到最近的邻居被认为是在周期晶格中的量子扩散的Grabert-Weiss方法。该模型适用于最近的测量原子H和D的Pt（111），渲染摩擦系数的范围内的文献中提供的其他种类的吸附物。一个简单的扩展模型也被认为是评估覆盖和隧道之间的关系，因此，该方法的可行性。隧道速率的增加已被观察到的表面覆盖度降低。
英文摘要：
The role of incoherent tunneling in the diffusion of light atoms on surfaces is investigated. With this purpose, a Chudley-Elliot master equation constrained to nearest neighbors is considered within the Grabert-Weiss approach to quantum diffusion in periodic lattices. This model is applied to recent measurements of atomic H and D on Pt(111), rendering friction coefficients that are in the range of those available in the literature for other species of adsorbates. A simple extension of the model has also been considered to evaluate the relationship between coverage and tunneling, and therefore the feasibility of the approach. An increase of the tunneling rate has been observed as the surface coverage decreases.
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