相互作用吸附质活化表面扩散的双浴模型
Two-bath model for activated surface diffusion of interacting adsorbates
摘要：
对于低-中等覆盖度（θ \lesssim 0.12），吸附物在表面上的扩散和低振动运动可以用纯随机模型，即所谓的相互作用单吸附物模型来很好地描述。在这个模型中，热表面声子和吸附质-吸附质碰撞的影响占两个不相关的噪声函数，产生在一个自然的方式从一个两浴模型的基础上概括的一浴Caldeira-Leggett哈密顿。作为例子，该模型被应用到Na原子在Cu（001）表面上的扩散具有不同的覆盖度。
英文摘要：
The diffusion and low vibrational motions of adsorbates on surfaces can be well described by a purely stochastic model, the so-called interacting single adsorbate model, for low-moderate coverages (θ\lesssim 0.12). Within this model, the effects of thermal surface phonons and adsorbate-adsorbate collisions are accounted for by two uncorrelated noise functions which arise in a natural way from a two-bath model based on a generalization of the one-bath Caldeira-Leggett Hamiltonian. As an illustration, the model is applied to the diffusion of Na atoms on a Cu(001) surface with different coverages.
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