二次耦合玻色子局域极化子模型中的非弹性散射
Inelastic scattering in a local polaron model with quadratic coupling to bosons
摘要：
本文计算了与玻色子二次耦合的局域极化子模型在宽带极限下的非弹性散射几率。中心对象是一个双粒子格林函数，它是使用纯代数方法精确计算的。与通常的线性相互作用项相比，二次相互作用项给出了涉及大量玻色子的更高的非弹性散射概率。作为应用，我们考虑了热电子在表面的能量传递问题，并利用密度泛函理论的delta自洽场方法计算和比较了CO在Cu（100）表面上激发不同振动模式的耦合参数和几率.
英文摘要：
We calculate the inelastic scattering probabilities in the wide band limit of a local polaron model with quadratic coupling to bosons. The central object is a two-particle Green function which is calculated exactly using a purely algebraic approach. Compared with the usual linear interaction term a quadratic interaction term gives higher probabilities for inelastic scattering involving a large number of bosons. As an application we consider the problem hot electron mediated energy transfer at surfaces and use the delta self-consistent field extension of density functional theory to calculate and compare coupling parameters and probabilities for exciting different vibrational modes of CO adsorbed on a Cu(100) surface.
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