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arXiv 1011.4113cond-mat.stat-mech
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外部场所作的功

The Work Done by an External Field

Mingliang Zhang, D. A. Drabold

摘要:

从外场引起的动能变化出发,讨论了已在\textit{ab initio}程序中实现的Kubo-Greenwood电导率公式(KGF)的Mott-Davis和Moseley-Lukes形式的适用条件.我们表明,简化的KGF是只适合于计算的AC电导率在足够高的频率和当载流子密度的梯度是小的。

英文摘要:

From the change in kinetic energy induced by an external field, we discuss the applicable conditions for the Mott-Davis and Moseley-Lukes form of the Kubo-Greenwood formula (KGF) for the electrical conductivity which has been implemented in \textit{ab initio} codes. We show that the simplified KGF is suitable only for computing the AC conductivity at sufficiently high frequency and when the gradient of the carrier density is small.

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