Real life RH (table from Hemmers book). Hall effect used in Hall probes for measuring magnetic fields. Simple Drude model not sufficient, Hall effect with mobilities. Current jx treated as result of both hole and electron motion. Electrons and holes different mobilities. (compare with the drawings for surface charges) Convention for mobilities and velocities. Equillibrium when the currents caused by electric + magnetic forces cancel in y-direction. The jx must be a result of Ex. Ex will be eliminated.

Click on picture for original, larger version.