Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2010-11-18
Physics
Condensed Matter
Statistical Mechanics
12 pages, submitted to J. Phys.: Condensed Matter
Scientific paper
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.
Drabold David A.
Zhang Ming-Liang
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