Effective carrier convention in the Nernst-Einstein relation
= Effective carrier convention in the Nernst-Einstein relation
The <density> and diffusivity in $\sigma=nq^2D/(k_BT)$ must refer to the same carrier species and correlation convention. <Oxygen vacancy> diffusivity belongs with vacancy <density>; <tracer diffusion> of oxygen atoms is not automatically the vacancy diffusivity. A transport inversion may determine an effective <density> without uniquely determining a chemical defect concentration.