Magnitude and Spatial Distribution Control of the Supercurrent in Bi2O2Se-Based Josephson Junction

Jianghua Ying; Jiangbo He; Guang Yang; Mingli Liu; Zhaozheng Lyu; Xiang Zhang; Huaiyuan Liu; Kui Zhao; Ruiyang Jiang; Zhongqing Ji; Jie Fan; Changli Yang; Xiunian Jing; Guangtong Liu; Xuewei Cao; Xuefeng Wang; Li Lu; Fanming Qu

doi:10.1021/acs.nanolett.0c00025

Magnitude and Spatial Distribution Control of the Supercurrent in Bi₂O₂Se-Based Josephson Junction

Nano Lett. 2020 Apr 8;20(4):2569-2575. doi: 10.1021/acs.nanolett.0c00025. Epub 2020 Mar 26.

Authors

Jianghua Ying^{1

2}, Jiangbo He^{1

2}, Guang Yang^{1

2}, Mingli Liu^{1

2}, Zhaozheng Lyu^{1

2}, Xiang Zhang^{1

2}, Huaiyuan Liu^{1

3}, Kui Zhao^{1

2}, Ruiyang Jiang^{1

2}, Zhongqing Ji^{1

4}, Jie Fan^{1

4}, Changli Yang¹, Xiunian Jing^{1

4}, Guangtong Liu^{1

4}, Xuewei Cao³, Xuefeng Wang⁵, Li Lu^{1

2

4

6

7}, Fanming Qu^{1

2

4

6}

Affiliations

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 School of Physics, Nankai University, Tianjin 300071, China.
⁴ Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China.
⁵ National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China.
⁶ CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China.
⁷ Beijing Academy of Quantum Information Sciences, Beijing 100193, China.

PMID: 32203670
DOI: 10.1021/acs.nanolett.0c00025

Abstract

Many proposals for exploring topological quantum computation are based on superconducting quantum devices constructed on materials with strong spin-orbit coupling (SOC). For these devices, full control of both the magnitude and the spatial distribution of the supercurrent is highly demanded, but has been elusive up to now. We constructed a proximity-type Josephson junction on nanoplates of Bi₂O₂Se, a new emerging semiconductor with strong SOC. Through electrical gating, we show that the supercurrent can be fully turned ON and OFF, and its real-space pathways can be configured either through the bulk or along the edges. Our work demonstrates Bi₂O₂Se as a promising platform for constructing multifunctional hybrid superconducting devices as well as for searching for topological superconductivity.

Keywords: Bi2O2Se nanoplate; Josephson junction; spatial distribution; supercurrent.