In particular, the Righi–Leduc effect describes the heat flow resulting from a perpendicular temperature gradient and vice versa.
[2] In this case, there are no charged currents in the solid, so the magnetic field cannot exert a Lorentz force.
Phonon thermal Hall effect have been measured in various class of non-magnetic insulating solids,[3][4][5][6] but the exact mechanism giving rise to this phenomenon is largely unknown.
[7] Given a conductor or semiconductor with a temperature difference in the x-direction and a magnetic field B perpendicular to it in the z-direction, then a temperature difference can occur in the transverse y-direction, The Righi–Leduc effect is a thermal analogue of the Hall effect.
The mobile charge carriers (usually electrons) are transversely deflected by the magnetic field due to the Lorentz force.