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Gate tunable Rashba spin-orbit coupling at CaZrO3/SrTiO3 heterointerface |
| Wei-Min Jiang(姜伟民)1,†, Qiang Zhao(赵强)1,†, Jing-Zhuo Ling(凌靖卓)1, Ting-Na Shao(邵婷娜)1, Zi-Tao Zhang(张子涛)1, Ming-Rui Liu(刘明睿)2, Chun-Li Yao(姚春丽)1, Yu-Jie Qiao(乔宇杰)1, Mei-Hui Chen(陈美慧)1, Xing-Yu Chen(陈星宇)1, Rui-Fen Dou(窦瑞芬)1,‡, Chang-Min Xiong(熊昌民)1,§, and Jia-Cai Nie(聂家财)1,¶ |
1 Department of Physics, Beijing Normal University, Beijing 100875, China;
2 State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China |
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Abstract High mobility quasi two-dimensional electron gas (2DEG) found at the CaZrO3/SrTiO3 nonpolar heterointerface is attractive and provides a platform for the development of functional devices and nanoelectronics. Here we report that the carrier density and mobility at low temperature can be tuned by gate voltage at the CaZrO3/SrTiO3 interface. Furthermore, the magnitude of Rashba spin-orbit interaction can be modulated and increases with the gate voltage. Remarkably, the diffusion constant and the spin-orbit relaxation time can be strongly tuned by gate voltage. The diffusion constant increases by a factor of ～ 19.98 and the relaxation time is reduced by a factor of over three orders of magnitude while the gate voltage is swept from -50 V to 100 V. These findings not only lay a foundation for further understanding the underlying mechanism of Rashba spin-orbit coupling, but also have great significance in developing various oxide functional devices.
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Received: 15 December 2021
Revised: 28 January 2022
Accepted manuscript online: 10 February 2022
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PACS:
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68.47.Gh
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(Oxide surfaces)
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73.20.-r
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(Electron states at surfaces and interfaces)
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81.15.Fg
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(Pulsed laser ablation deposition)
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| Fund: Project supported by the National Natural Science Foundation of China (Grants Nos. 92065110, 11974048, and 12074334). |
Corresponding Authors:
Rui-Fen Dou, Chang-Min Xiong, Jia-Cai Nie
E-mail: ruifendou@bnu.edu.cn;cmxiong@bnu.edu.cn;jcnie@bnu.edu.cn
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Cite this article:
Wei-Min Jiang(姜伟民), Qiang Zhao(赵强), Jing-Zhuo Ling(凌靖卓), Ting-Na Shao(邵婷娜), Zi-Tao Zhang(张子涛), Ming-Rui Liu(刘明睿), Chun-Li Yao(姚春丽), Yu-Jie Qiao(乔宇杰), Mei-Hui Chen(陈美慧), Xing-Yu Chen(陈星宇), Rui-Fen Dou(窦瑞芬), Chang-Min Xiong(熊昌民), and Jia-Cai Nie(聂家财) Gate tunable Rashba spin-orbit coupling at CaZrO3/SrTiO3 heterointerface 2022 Chin. Phys. B 31 066801
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