Figure 4. Negative longitudinal magnetoresistance in TaP.

(a) Longitudinal MR*=[V−V(B=0)]/V(B=0) for B||I||c for different temperatures. (b) Same for B||I||a. The temperatures are the same as in a. (c) Same for B||I||a and three pairs of contacts. The difference in the curves can be explained by an inhomogeneous current distribution induced by the magnetic field (see text). The contact geometry is shown in the inserts: (b) for S1 and S2, and (c) for S4. (d) Theoretical curves for S4 as in c.