Kadowaki–Woods ratio

The Kadowaki–Woods ratio is the ratio of A, the quadratic term of the resistivity and γ2, the linear term of the specific heat. This ratio is found to be a constant for transition metals, and for heavy-fermion compounds, although at different values.

In 2009, Anthony Jacko, John Fjaerestad, and Ben Powell showed that the different ratios could be understood on the basis of different materials specific properties, such as the density of states and the electron density, even before electron-electron interactions were taken into account.