Electron localization and negative magnetoresistance in disordered PbTe films
Krylov I. P. , Poyarkov Ya. B.
A negative magnetoresistance, AR [H) < 0, has been observed in PbTe films in the hopping-conductivity region. The increase in the carrier density due to the frozen photoconductivity causes AR /R to drop to zero and changes the sign of AR [H).