Fig. 3: The re-entrant superconductivity.

a The temperature dependence of the magnetoresistance when the magnetic field sweeps from −1 T to 1 T. With temperature increasing, the critical magnetic field gradually decreases. However, a re-entrant superconductivitsssy occurs at around 400 mK. Here we label the superconducting dome obtained before the re-entrance of superconductivity as SC-I and the superconducting dome obtained after the re-entrance of superconductivity as SC-II. b The waterfall plot of the resistance at different temperatures. It is evident that the re-entrant superconductivity starts at 400 mK. The red curves denote a forward sweep, while the black curves represent a backward sweep. c The out-of-plane angle dependence of two superconducting states at a temperature of 400 mK. d The temperature dependence of the mapping plot of the two superconducting states versus the magnetic field and bias current.