Fig. 1: Resistivity and Hall mobility of Nb:SrTiO3 single crystals.
a Temperature dependence of resistivity with nominal Nb content x values of 0.0002, 0.0005, 0.001, 0.002, 0.0035, 0.005, 0.007, 0.01, 0.015, 0.02, and 0.05 over the range from room temperature down to 3 K. The numbers of Ti 3d electrons deduced from Hall effect measurements are noted in parentheses. b Hall mobilities of our samples at 5 K (blue symbols), along with those of SrTiO3−δ (black symbols) and Nb:SrTiO3 (red symbols) (refs.44,64,65,66). The solid lines represent the characteristics of a phenomenological model67, \(\mu \propto n^{ - \frac{5}{6}}\), that fits the experimental data very well.
