Interface-Induced High-Temperature Superconductivity in Single Unit-Cell FeSe Films on SrTiO3

  title={Interface-Induced High-Temperature Superconductivity in Single Unit-Cell FeSe Films on SrTiO3},
  author={Qing-Yan Wang and Zhi Li and Wen-Hao Zhang and Zuocheng Zhang and Jin-song Zhang and Wei Li and Hao Ding and Yunbo Ou and Peng Deng and Kai-Kuen Chang and Jing Wen and Canli Song and Ke He and Jin-Feng Jia and Shuai-hua Ji and Yayu Wang and Lili Wang and Xi Chen and Xucun Ma and Qi-Kun Xue},
  journal={Chinese Physics Letters},
We report high transition temperature superconductivity in one unit-cell (UC) thick FeSe films grown on a Se-etched SrTiO3 (001) substrate by molecular beam epitaxy (MBE). A superconducting gap as large as 20 meV and the magnetic field induced vortex state revealed by in situ scanning tunneling microscopy (STM) suggest that the superconductivity of the 1 UC FeSe films could occur around 77 K. The control transport measurement shows that the onset superconductivity temperature is well above 50 Kโ€ฆย Expand

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