Selective-Area-Grown PbTe-Pb Planar Josephson Junctions for Quantum Devices

Li, Ruidong1; Song, Wenyu1; Miao, Wentao1; Yu, Zehao1; Wang, Zhaoyu1; Yang, Shuai1; Gao, Yichun1; Wang, Yuhao1; Chen, Fangting1; Geng, Zuhan1; Yang, Lining1; Xu, Jiaye1; Feng, Xiao1,2,3,4; Wang, Tiantian2,4; Zang, Yunyi2,4; Li, Lin2; Shang, Runan2,4; Xue, Qikun1,2,3,4,5; He, Ke1,2,3,4; Zhang, Hao1,2,3

2024-04-02

10.1021/acs.nanolett.4c00900

NANO LETTERS   影响因子和分区

1530-6984

1530-6992

Planar Josephson junctions are predicted to host Majorana zero modes. The material platforms in previous studies are two-dimensional electron gases (InAs, InSb, InAsSb, and HgTe) coupled to a superconductor such as Al or Nb. Here, we introduce a new material platform for planar JJs, the PbTe-Pb hybrid. The semiconductor, PbTe, was grown as a thin film via selective area epitaxy. The Josephson junction was defined by a shadow wall during the deposition of superconductor Pb. Scanning transmission electron microscopy reveals a sharp semiconductor-superconductor interface. Gate-tunable supercurrents and multiple Andreev reflections are observed. A perpendicular magnetic field causes interference patterns of the switching current, exhibiting Fraunhofer-like and SQUID-like behaviors. We further demonstrate a prototype device for Majorana detection wherein phase bias and tunneling spectroscopy are applicable.

PbTe planar Josephson junctions supercurrentinterference topological superconductivity

SCI ; EI

英语

其他

National Natural Science Foundation of China[92065206] ; Tsinghua University Initiative Scientific Research Program, National Natural Science Foundation of China[2021ZD0302400]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001196751900001

AMER CHEMICAL SOC

MATERIALS SCIENCE

Web of Science

1.Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
2.Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China
3.Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China
4.Hefei Natl Lab, Hefei 230088, Peoples R China
5.Southern Univ Sci & Technol, Shenzhen 518055, Peoples R China

Li, Ruidong,Song, Wenyu,Miao, Wentao,et al. Selective-Area-Grown PbTe-Pb Planar Josephson Junctions for Quantum Devices[J]. NANO LETTERS,2024,24(15).

Li, Ruidong.,Song, Wenyu.,Miao, Wentao.,Yu, Zehao.,Wang, Zhaoyu.,...&Zhang, Hao.(2024).Selective-Area-Grown PbTe-Pb Planar Josephson Junctions for Quantum Devices.NANO LETTERS,24(15).

Li, Ruidong,et al."Selective-Area-Grown PbTe-Pb Planar Josephson Junctions for Quantum Devices".NANO LETTERS 24.15(2024).