The magnetoresistance of the quasi-one-dimensional conductor NbSe3

The temperature dependence of the resistivity and magnetoresistance (MR) of quasi-one-dimensional NbSe 3 was studied. The sharp increase of the positive MR in the lower charge-density wave (CDW) phase is consistent with previous reports, and the violation of Kohler’s rule is obvious. We found that the MR data can be fitted very well with a modified two-band model, and the temperature dependence of the resulting parameters was discussed. The MR, the effect of magnetic field on the CDW gap, and the thermoelectric power of NbSe 3 can be coherently understood within this model.