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Growth of high-quality perovskite (110)-SrIrO3 thin films using reactive molecular beam epitaxy |
| Kai-Li Zhang(张凯莉)1,2, Cong-Cong Fan(樊聪聪)1,2, Wan-Ling Liu(刘万领)3, Yu-Feng Wu(吴宇峰)1,2, Xiang-Le Lu(卢祥乐)1,2, Zheng-Tai Liu(刘正太)1,4, Ji-Shan Liu(刘吉山)1,4, Zhong-Hao Liu(刘中灏)1,4, Da-Wei Shen(沈大伟)1,4 |
1 State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology(SIMIT), Chinese Academy of Sciences(CAS), Shanghai 200050, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China;
4 CAS Center for Excellence in Superconducting Electronics(CENSE), Shanghai 200050, China |
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Abstract Recently, 5d transition metal iridates have been reported as promising materials for the manufacture of exotic quantum states. Apart from the semimetallic ground states that have been observed, perovskite SrIrO3 is also predicted to have a lattice-symmetrically protected topological state in the (110) plane due to its strong spin-orbit coupling and electron correlation. Compared with non-polar (001)-SrIrO3, the especial polarity of (110)-SrIrO3 undoubtedly adds the difficulty of fabrication and largely impedes the research on its surface states. Here, we have successfully synthesized high-quality (110)-SrIrO3 thin films on (110)-SrTiO3 substrates by reactive molecular beam epitaxy for the first time. Both reflection high-energy electron diffraction patterns and x-ray diffraction measurements suggest the expected orientation and outstanding crystallinity. A (1×2) surface reconstruction driven from the surface instability, the same as that reported in (110)-SrTiO3, is observed. The electric transport measurements uncover that (110)-SrIrO3 exhibits a more prominent semimetallic property in comparison to (001)-SrIrO3.
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Received: 01 May 2018
Revised: 20 May 2018
Accepted manuscript online:
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PACS:
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81.15.-z
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(Methods of deposition of films and coatings; film growth and epitaxy)
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61.05.jh
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(Low-energy electron diffraction (LEED) and reflection high-energy electron diffraction (RHEED))
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71.70.Ej
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(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
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71.27.+a
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(Strongly correlated electron systems; heavy fermions)
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| Fund: Project supported by the National Key Research and Development Program of the MOST of China (Grant No. 2016YFA0300204), the National Key Basic Research Program of China (Grant No. 2015CB654901), the National Natural Science Foundation of China (Grant Nos. 11574337, 11227902, 11474147, and 11704394), Shanghai Sailing Program (Grant No. 17YF1422900), and the Award for Outstanding Member in Youth Innovation Promotion Association of the Chinese Academy of Sciences. |
Corresponding Authors:
Da-Wei Shen
E-mail: dwshen@mail.sim.ac.cn
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Cite this article:
Kai-Li Zhang(张凯莉), Cong-Cong Fan(樊聪聪), Wan-Ling Liu(刘万领), Yu-Feng Wu(吴宇峰), Xiang-Le Lu(卢祥乐), Zheng-Tai Liu(刘正太), Ji-Shan Liu(刘吉山), Zhong-Hao Liu(刘中灏), Da-Wei Shen(沈大伟) Growth of high-quality perovskite (110)-SrIrO3 thin films using reactive molecular beam epitaxy 2018 Chin. Phys. B 27 088103
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