Fig. 1. X-ray diffraction pattern of the InN film.

Fig. 2. （a） R-T transitions，（b） R-B² transitions as a function of temperature，（c） The upper critical field B_c2 as a function of temperature. In（a–c）， the resistance is measured with a current of 1 μA

Fig. 3. （a） I-V curves at various temperatures from 120 mK to 3 K for self-field，（b） VG scaling of the I-V curves in（a）.（c） The temperature dependence of I-V exponent in（a）

Fig. 4. Vortex phase diagram of InN superconductor.

Fig. 5. （a） log（R） vs 1/T in various fields and the fitting results of TAFF model.（b） Field dependence of U₀ （B）. the solid lines are power-law fits using U₀（B）~ B^-α.

Fig. 6. （a） The dots are experimental data of temperature dependence of I_c at zero field. The blue, green, and red lines are fitting results using δT_c, δL, and the combined δL+δT_cmodel, respectively,（b） Temperature dependence of I_c in various fields and the fitting results of δL+δT_c model.

Fig. 7. （a） Magnetic field dependence of critical current I_c and the fitting results of exponential-law,（b） Reduced field dependence of normalized flux pinning force f_p（h） at various temperatures. Solid line is the fitting curve using Eq.（6）