中国物理B ›› 2018, Vol. 27 ›› Issue (7): 76801-076801.doi: 10.1088/1674-1056/27/7/076801
所属专题： Virtual Special Topic — Magnetism and Magnetic Materials
• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇 下一篇
Growth and transport properties of topological insulator Bi2Se3 thin film on a ferromagnetic insulating substrate
Shanna Zhu(朱珊娜), Gang Shi(史刚), Peng Zhao(赵鹏), Dechao Meng(孟德超), Genhao Liang(梁根豪), Xiaofang Zhai(翟晓芳), Yalin Lu(陆亚林), Yongqing Li(李永庆), Lan Chen(陈岚), Kehui Wu(吴克辉)
- 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China;
4 Microsystem and Terahertz Research Center & Institute of Electronic Engineering, CAEP, Mianyang 621900, China;
5 Synergy Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
6 National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China;
7 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
Growth and transport properties of topological insulator Bi2Se3 thin film on a ferromagnetic insulating substrate
Shanna Zhu(朱珊娜)1,2, Gang Shi(史刚)1,2, Peng Zhao(赵鹏)1,2, Dechao Meng(孟德超)3,4, Genhao Liang(梁根豪)3, Xiaofang Zhai(翟晓芳)3,5, Yalin Lu(陆亚林)3,5,6, Yongqing Li(李永庆)1, Lan Chen(陈岚)1,2, Kehui Wu(吴克辉)1,2,7
- 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China;
4 Microsystem and Terahertz Research Center & Institute of Electronic Engineering, CAEP, Mianyang 621900, China;
5 Synergy Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
6 National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China;
7 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
摘要：
Exchange coupling between topological insulator and ferromagnetic insulator through proximity effect is strongly attractive for both fundamental physics and technological applications. Here we report a comprehensive investigation on the growth behaviors of prototype topological insulator Bi2Se3 thin film on a single-crystalline LaCoO3 thin film on SrTiO3 substrate, which is a strain-induced ferromagnetic insulator. Different from the growth on other substrates, the Bi2Se3 films with highest quality on LaCoO3 favor a relatively low substrate temperature during growth. As a result, an inverse dependence of carrier mobility with the substrate temperature is found. Moreover, the magnetoresistance and coherence length of weak antilocalization also have a similar inverse dependence with the substrate temperature, as revealed by the magnetotransport measurements. Our experiments elucidate the special behaviors in Bi2Se3/LaCoO3 heterostructures, which provide a good platform for exploring related novel quantum phenomena, and are inspiring for device applications.
中图分类号: (Thin film structure and morphology)
- 68.55.-a