Figure 1: Electrical and thermal conductivity of iron at Earth’s outer core conditions.
From: Thermal and electrical conductivity of iron at Earth’s core conditions
a–c, Electrical conductivity, σ (a), and electronic component of thermal conductivity, k (b), of pure iron corresponding to the three outer-core adiabatic profiles (adiabats) displayed in c. Black lines, adiabat corresponding to the melting temperature of pure iron at ICB pressure; red lines, that of the mixture containing 10% Si and 8% O; and blue lines, that of the mixture with 8% Si and 13% O. Lines are quadratic fits to the first principles raw data (symbols). Error bars (2 s.d.) are estimated from the scattering of the data obtained from 40 statistical independent configurations. Results are obtained with cells including 157 atoms and the single k-point (1/4,1/4,1/4), which are sufficient to obtain convergence within less than 1%.
