Fig. 1

Results of resistivity measurements in α-Ga. a The log–log plot of resistivity ρ(T) measured at various applied magnetic field H = 0, 0.5, 1, 2, 3, 5, 7, and 9 T for H // b-axis, the current J is within the ac-plane. b ∂ρ (T)/ ∂T plotted as a function of temperature. The minimum in the curve ∂ρ (T)/∂T marks the inflection point T_i, and the sign change in the curve ∂ρ (T)/∂T marks the resistivity minimum at T_m, shown in the upper inset. T_m and T_i plotted as the function of applied magnetic fields is in the low inset in which T_i stays almost unchanged whereas T_m clearly evolves with field. c The normalized magnetoresistance as a function of temperature at various magnetic fields. d Specific heat capacity divided by temperature as a function of T². The lambda-like peaks indicate a superconducting phase below 0.9 K. e Resistance as a function of temperature at various magnetic fields (0, 0.5, 1.5, 2, 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 10, 15, 20, 50, and 100 mT). f Resistance as a function of applied field at 0.5 K. The inset displays the resistance in lower magnetic fields