1. Interface-Induced High-Temperature Superconductivity in Single Unit-Cell FeSe Films on SrTiO3.
- Author
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Wang Qing-Yan, Li Zhi, Zhang Wen-Hao, Zhang Zuo-Cheng, Zhang Jin-Song, Li Wei, Ding Hao, Ou Yun-Bo, Deng Peng, Chang Kai, Wen Jing, Song Can-Li, He Ke, Jia Jin-Feng, Ji Shuai-Hua, Wang Ya-Yu, Wang Li-Li, Chen Xi, Ma Xu-Cun, and Xue Qi-Kun
- Subjects
STRONTIUM titanate ,HIGH temperatures ,SUPERCONDUCTIVITY ,THIN films ,TRANSITION temperature ,MOLECULAR beam epitaxy ,SCANNING tunneling microscopy - Abstract
We report high transition temperature superconductivity in one unit-cell (UC) thick FeSe films grown on a Seetched SrTiO
3 (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 K. Our work not only demonstrates a powerful way for finding new superconductors and for raising TC , but also provides a well-defined platform for systematic studies of the mechanism of unconventional superconductivity by using different superconducting materials and substrates. [ABSTRACT FROM AUTHOR]- Published
- 2012
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