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

被引：1204

作者：

Wang Qing-Yan ^{[1
,2
]}

Li Zhi ^{[1
]}

Zhang Wen-Hao ^{[2
]}

Zhang Zuo-Cheng ^{[2
]}

Zhang Jin-Song ^{[2
]}

Li Wei ^{[2
]}

Ding Hao ^{[2
]}

Ou Yun-Bo ^{[1
]}

Deng Peng ^{[2
]}

Chang Kai ^{[2
]}

Wen Jing ^{[2
]}

Song Can-Li ^{[2
]}

He Ke ^{[1
]}

Jia Jin-Feng ^{[2
]}

Ji Shuai-Hua ^{[2
]}

Wang Ya-Yu ^{[2
]}

Wang Li-Li ^{[1
]}

Chen Xi ^{[2
]}

Ma Xu-Cun ^{[1
]}

Xue Qi-Kun ^{[2
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[2] Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2012年 / 29卷 / 03期

基金：

中国国家自然科学基金;

关键词：

COMPOUND; PRESSURE;

D O I：

10.1088/0256-307X/29/3/037402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 K. Our work not only demonstrates a powerful way for finding new superconductors and for raising T-C, but also provides a well-defined platform for systematic studies of the mechanism of unconventional superconductivity by using different superconducting materials and substrates.

引用

页数：4

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