Fig. 6: Negative magnetoresistance signature.

Transverse magnetoresistance of SMAS measured at selected temperatures with a magnetic field applied to H//a a and H//c b. The dotted lines represent fits to a B2 dependence and the solid lines to a B1.5 dependence of the low-field magnetoresistance. c Angle-dependent magnetoresistance measured at T = 2 K in a magnetic field of B = 9 T.