Selective-Area-Grown PbTe-Pb Planar Josephson Junctions for Quantum Devices
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , , , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2023
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866911822672560128 |
|---|---|
| author | Li, Ruidong Song, Wenyu Miao, Wentao Yu, Zehao Wang, Zhaoyu Yang, Shuai Gao, Yichun Wang, Yuhao Chen, Fangting Geng, Zuhan Yang, Lining Xu, Jiaye Feng, Xiao Wang, Tiantian Zang, Yunyi Li, Lin Shang, Runan Xue, Qi-Kun He, Ke Zhang, Hao |
| author_facet | Li, Ruidong Song, Wenyu Miao, Wentao Yu, Zehao Wang, Zhaoyu Yang, Shuai Gao, Yichun Wang, Yuhao Chen, Fangting Geng, Zuhan Yang, Lining Xu, Jiaye Feng, Xiao Wang, Tiantian Zang, Yunyi Li, Lin Shang, Runan Xue, Qi-Kun He, Ke Zhang, Hao |
| contents | 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 the superconductor Pb. Scanning transmission electron microscopy reveals a sharp semiconductor-superconductor interface. Gate-tunable supercurrent 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_16815 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Selective-Area-Grown PbTe-Pb Planar Josephson Junctions for Quantum Devices Li, Ruidong Song, Wenyu Miao, Wentao Yu, Zehao Wang, Zhaoyu Yang, Shuai Gao, Yichun Wang, Yuhao Chen, Fangting Geng, Zuhan Yang, Lining Xu, Jiaye Feng, Xiao Wang, Tiantian Zang, Yunyi Li, Lin Shang, Runan Xue, Qi-Kun He, Ke Zhang, Hao Superconductivity Mesoscale and Nanoscale Physics Materials Science 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 the superconductor Pb. Scanning transmission electron microscopy reveals a sharp semiconductor-superconductor interface. Gate-tunable supercurrent 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. |
| title | Selective-Area-Grown PbTe-Pb Planar Josephson Junctions for Quantum Devices |
| topic | Superconductivity Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2311.16815 |