Figure 5

(a) Resistance (R) normalized by the room temperature resistance values (R_{300 K}) versus temperature (T) for the FZ cuts 1–4. The inset highlights the trend in normalized resistance from 0 to 10 K showing that the magnitude of R/R_{300 K} and the degree of plateauing decreases from 1 to 4. (b) Resistance (R) normalized by the room temperature resistance values (R_{300 K}) versus temperature (T) for two FG SmB6 crystals arbitrarily designated “1” and “2”. While the magnitudes of the R/R_{300 K} data points differ at low temperatures, a resistance plateau is observed for these crystals and other FG SmB₆ crystals from this growth. These low temperature data resemble closely other flux samples reported in literature, carbon doped SmB₆ FZ crystals and cut 1 seen in a).