2.4.5.3 Righi-Leduc Coefficients

The Righi-Leduc coefficients $\pounds_n$ ($\pounds_p$) characterize the transverse temperature gradient caused by the deflection of an electron (hole) heat current flowing 'down a temperature gradient':

$$\pounds_{n,p} = \frac{\nabla T\cdot (\mathbf{B}\times \mathbf{Q_{n,p}})} {(\mathbf{B}\times\nabla T)\cdot (\mathbf{B}\times \mathbf{Q_{n,p}})} \quad \mathbf{J_{n,p}}=0$$ (2.13)