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

Authors

Wenhao Zhang, Chinese Academy Of Sciences, Tsinghua University
Yi Sun, Peking UniversityFollow
Jin Zhang, Tsinghua UniversityFollow
Fangsen Li, Tsinghua University, Chinese Academy Of Sciences
Ming-Hua Guo, Tsinghua University
Yanfei Zhao, Peking University
Hui-Min Zhang, Chinese Academy of Sciences
Jun-Ping Peng, Chinese Academy of Sciences
Ying Xing, Peking University
Hui Wang, Peking UniversityFollow
Takeshi Fujita, Tohoku University
Akihiko Hirata, Tohoku University
Zhi Li, Chinese Academy of SciencesFollow
Hao Ding, Tsinghua University
Chenjia Tang, Tsinghua University, Chinese Academy Of Sciences
Meng Wang, Chinese Academy Of Sciences
Qingyan Wang, Tsinghua University
Ke He, Tsinghua University, Collaborative Innovation Center Of Quantum Matter, Chinese Academy Of Sciences
Shuaihua Ji, Tsinghua University, Collaborative Innovation Center Of Quantum Matter
Xi Chen, Collaborative Innovation Center Of Quantum Matter, Tsinghua University
Junfeng Wang, Huazhong University of Science and Technology
Zheng-Cai Xia, Huazhong University of Science and Technology
Liang Li, Huazhong University of Science and Technology
Ya-Yu Wang, Collaborative Innovation Center Of Quantum Matter, Tsinghua University
Jian Wang, Collaborative Innovation Center Of Quantum Matter, Peking UniversityFollow
Lili Wang, Tsinghua University, Chinese Academy Of Sciences, Collaborative Innovation Center Of Quantum MatterFollow
Ming-Wei Chen, Tohoku University
Qi-Kun Xue, Tsinghua University, Collaborative Innovation Center Of Quantum MatterFollow
Xu-Cun Ma, Tsinghua University, Collaborative Innovation Center Of Quantum Matter, Chinese Academy Of Sciences

RIS ID

115195

Publication Details

Zhang, W., Sun, Y., Zhang, J., Li, F., Guo, M., Zhao, Y., Zhang, H., Peng, J., Xing, Y., Wang, H., Fujita, T., Hirata, A., Li, Z., Ding, H., Tang, C., Wang, M., Wang, Q., He, K., Ji, S., Chen, X., Wang, J., Xia, Z., Li, L., Wang, Y., Wang, J., Wang, L., Chen, M., Xue, Q. & Ma, X. (2014). Direct Observation of High-Temperature Superconductivity in One-Unit-Cell FeSe Films. Chinese Physics Letters, 31 (1), 017401-1-017401-5.

Abstract

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 𝑇C above 40 K and an extremely large critical current density 𝐽C∼1.7×106 A/cm2 at 2 K, which are much higher than 𝑇C∼8 K and 𝐽C∼104 A/cm2 for bulk FeSe, respectively. Our work may pave the way to enhancing and tailoring superconductivity by interface engineering

Please refer to publisher version or contact your library.

Share

COinS
 

Link to publisher version (DOI)

http://dx.doi.org/10.1088/0256-307X/31/1/017401