On the sign reversal of the flux-flow Hall effect in type-II superconductors
Kopnin N.B., Ivlev ÷.I., Kalatsky V.A.
For the BCS model of superconductivity, the Hall voltage in the mixed state is shown to be proportional to the energy derivative of the quasiparticle density of states. There is a possibility that the sign of the Hall effect in the mixed state is different from that in the normal state. In the latter case, the Hall angle changes its sign as a function of the magnetic field below Hci.