Two-dimensional superconductivity at the surfaces of KTaO3 gated with ionic liquid

  title={Two-dimensional superconductivity at the surfaces of KTaO3 gated with ionic liquid},
  author={Tianshuang Ren and Miaocong Li and Xikang Sun and Le Ju and Yuan Liu and Siyuan Hong and Yanqiu Sun and Q. Tao and Yi Zhou and Zhu-An Xu and Yanwu Xie},
  journal={Science Advances},
The recent discovery of superconductivity at the interfaces between KTaO3 and EuO (or LaAlO3) gives birth to the second generation of oxide interface superconductors. This superconductivity exhibits a strong dependence on the surface plane of KTaO3, in contrast to the seminal LaAlO3/SrTiO3 interface, and the superconducting transition temperature Tc is enhanced by one order of magnitude. For understanding its nature, a crucial issue arises: Is the formation of oxide interfaces indispensable for… 

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