Transport properties for Zn+ ion implanted InN films at low temperature

An intrinsic superconducting transition of about 3.8 K is observed in Zn-ion implanted InN films. Zn dopants induce the pinning effect, making the superconductivity more robust to magnetic field H. Moreover, the quasi-two-dimensionality of this superconductivity is demonstrated by linear behavior of U0 versus ln(1/H) curve with magnetic field ranging from lower critical field to 1.3 T.