Direct Observation of High-Temperature Superconductivity in One-Unit-Cell FeSe Films

被引：285

作者：

Zhang Wen-Hao ^{[1
,4
]}

Sun Yi ^{[2
]}

Zhang Jin-Song ^{[1
]}

Li Fang-Sen ^{[1
,4
]}

Guo Ming-Hua ^{[1
]}

Zhao Yan-Fei ^{[2
]}

Zhang Hui-Min ^{[4
]}

Peng Jun-Ping ^{[4
]}

Xing Ying ^{[2
]}

Wang Hui-Chao ^{[2
]}

Fujita, Takeshi ^{[5
]}

Hirata, Akihiko ^{[5
]}

Li Zhi ^{[4
]}

Ding Hao ^{[1
]}

Tang Chen-Jia ^{[1
,4
]}

Wang Meng ^{[4
]}

Wang Qing-Yan ^{[1
]}

He Ke ^{[1
,3
,4
]}

Ji Shuai-Hua ^{[1
,3
]}

Chen Xi ^{[1
,3
]}

Wang Jun-Feng ^{[6
]}

Xia Zheng-Cai ^{[6
]}

Li Liang ^{[6
]}

Wang Ya-Yu ^{[1
,3
]}

Wang Jian ^{[2
,3
]}

Wang Li-Li ^{[1
,3
,4
]}

Chen Ming-Wei ^{[5
]}

Xue Qi-Kun ^{[1
,3
]}

Ma Xu-Cun ^{[1
,3
,4
]}

机构：

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

[2] Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China

[3] Collaborat Innovat Ctr Quantum Matter, Beijing, Peoples R China

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

[5] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

[6] Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430071, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2014年 / 31卷 / 01期

基金：

中国国家自然科学基金;

关键词：

CRITICAL-CURRENT-DENSITY; PHASE-DIAGRAM; OXIDES;

D O I：

10.1088/0256-307X/31/1/017401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We prepared one-unit-cell (1-UC) thick FeSe films on insulating SrTiO3 substrates with non-superconducting FeTe protection layers by molecular beam epitaxy for ex situ studies. By direct transport and magnetic measurements, we provide definitive evidence for high temperature superconductivity in the 1-UC FeSe films with an onset T-C above 40K and an extremely large critical current density J(C) similar to 1.7x10(6) A/cm(2) at 2 K, which are much higher than T-C similar to 8K and J(C)similar to 10(4) A/cm(2) for bulk FeSe, respectively. Our work may pave the way to enhancing and tailoring superconductivity by interface engineering.

引用

页数：5

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