Tunable superconductivity in parent cuprate Pr2CuO4±δ thin films

Tunable superconductivity in parent cuprate Pr₂CuO_4±δ thin films

Wei Xinjian^{1, 2}, He Ge^{1, 2}, Hu Wei^{1, 2}, Zhang Xu^{1, 2}, Qin Mingyang^{1, 2}, Yuan Jie^{1, 3}, Zhu Beiyi¹, Lin Yuan⁴, Jin Kui^{1, 2, 3, 5, †}

Resistivity as a function of temperature for Pr₂CuO_4±δ films with various oxygen contents. (a) The resistivity of the samples US3, US19, and US21 shows an upturn at the temperature defined as T_min. (b) The resistivity versus temperature of S22, S19, S11, and S3 samples shows a good metallic behavior. The number in the sample label presents the superconducting transition temperature.