Tunable Photoresponse in a Two-Dimensional Superconducting Heterostructure
The photo-induced superconducting phase transition is widely used in probing the physical properties of correlated electronic systems and to realize broadband photodetection with extremely high responsivity. However, such photoresponse is usually insensitive to electrostatic doping due to the high c...
| Những tác giả chính: | , , , , , , , |
|---|---|
| Định dạng: | Bài viết |
| Ngôn ngữ: | English |
| Được phát hành: |
MDPI AG
2023-01-01
|
| Loạt: | Nanomaterials |
| Những chủ đề: | |
| Truy cập trực tuyến: | https://www.mdpi.com/2079-4991/13/3/421 |
| _version_ | 1827759718213353472 |
|---|---|
| author | Zijie Ji Ruan Zhang Shuangxing Zhu Feifan Gu Yunmin Jin Binghe Xie Jiaxin Wu Xinghan Cai |
| author_facet | Zijie Ji Ruan Zhang Shuangxing Zhu Feifan Gu Yunmin Jin Binghe Xie Jiaxin Wu Xinghan Cai |
| author_sort | Zijie Ji |
| collection | DOAJ |
| description | The photo-induced superconducting phase transition is widely used in probing the physical properties of correlated electronic systems and to realize broadband photodetection with extremely high responsivity. However, such photoresponse is usually insensitive to electrostatic doping due to the high carrier density of the superconductor, restricting its applications in tunable optoelectronic devices. In this work, we demonstrate the gate voltage modulation to the photoresponsivity in a two-dimensional NbSe<sub>2</sub>-graphene heterojunction. The superconducting critical current of the NbSe<sub>2</sub> relies on the gate-dependent hot carrier generation in graphene via the Joule heating effect, leading to the observed shift of both the magnitude and peak position of the photoresponsivity spectra as the gate voltage changes. This heating effect is further confirmed by the temperature and laser-power-dependent characterization of the photoresponse. In addition, we investigate the spatially-resolved photocurrent, finding that the superconductivity is inhomogeneous across the junction area. Our results provide a new platform for designing tunable superconducting photodetector and indicate that the photoresponse could be a powerful tool in studying the local electronic properties and phase transitions in low-dimensional superconducting systems. |
| first_indexed | 2024-03-11T09:31:42Z |
| format | Article |
| id | doaj.art-b667673609d841c6a35d974854516cc8 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T09:31:42Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-b667673609d841c6a35d974854516cc82023-11-16T17:34:28ZengMDPI AGNanomaterials2079-49912023-01-0113342110.3390/nano13030421Tunable Photoresponse in a Two-Dimensional Superconducting HeterostructureZijie Ji0Ruan Zhang1Shuangxing Zhu2Feifan Gu3Yunmin Jin4Binghe Xie5Jiaxin Wu6Xinghan Cai7National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Shanghai Jiao Tong University, Shanghai 200240, ChinaNational Key Laboratory of Science and Technology on Micro/Nano Fabrication, Shanghai Jiao Tong University, Shanghai 200240, ChinaNational Key Laboratory of Science and Technology on Micro/Nano Fabrication, Shanghai Jiao Tong University, Shanghai 200240, ChinaNational Key Laboratory of Science and Technology on Micro/Nano Fabrication, Shanghai Jiao Tong University, Shanghai 200240, ChinaNational Key Laboratory of Science and Technology on Micro/Nano Fabrication, Shanghai Jiao Tong University, Shanghai 200240, ChinaNational Key Laboratory of Science and Technology on Micro/Nano Fabrication, Shanghai Jiao Tong University, Shanghai 200240, ChinaNational Key Laboratory of Science and Technology on Micro/Nano Fabrication, Shanghai Jiao Tong University, Shanghai 200240, ChinaNational Key Laboratory of Science and Technology on Micro/Nano Fabrication, Shanghai Jiao Tong University, Shanghai 200240, ChinaThe photo-induced superconducting phase transition is widely used in probing the physical properties of correlated electronic systems and to realize broadband photodetection with extremely high responsivity. However, such photoresponse is usually insensitive to electrostatic doping due to the high carrier density of the superconductor, restricting its applications in tunable optoelectronic devices. In this work, we demonstrate the gate voltage modulation to the photoresponsivity in a two-dimensional NbSe<sub>2</sub>-graphene heterojunction. The superconducting critical current of the NbSe<sub>2</sub> relies on the gate-dependent hot carrier generation in graphene via the Joule heating effect, leading to the observed shift of both the magnitude and peak position of the photoresponsivity spectra as the gate voltage changes. This heating effect is further confirmed by the temperature and laser-power-dependent characterization of the photoresponse. In addition, we investigate the spatially-resolved photocurrent, finding that the superconductivity is inhomogeneous across the junction area. Our results provide a new platform for designing tunable superconducting photodetector and indicate that the photoresponse could be a powerful tool in studying the local electronic properties and phase transitions in low-dimensional superconducting systems.https://www.mdpi.com/2079-4991/13/3/421niobium diselenidevan der Waals heterostructuresuperconducting photodetectorgate modulation |
| spellingShingle | Zijie Ji Ruan Zhang Shuangxing Zhu Feifan Gu Yunmin Jin Binghe Xie Jiaxin Wu Xinghan Cai Tunable Photoresponse in a Two-Dimensional Superconducting Heterostructure Nanomaterials niobium diselenide van der Waals heterostructure superconducting photodetector gate modulation |
| title | Tunable Photoresponse in a Two-Dimensional Superconducting Heterostructure |
| title_full | Tunable Photoresponse in a Two-Dimensional Superconducting Heterostructure |
| title_fullStr | Tunable Photoresponse in a Two-Dimensional Superconducting Heterostructure |
| title_full_unstemmed | Tunable Photoresponse in a Two-Dimensional Superconducting Heterostructure |
| title_short | Tunable Photoresponse in a Two-Dimensional Superconducting Heterostructure |
| title_sort | tunable photoresponse in a two dimensional superconducting heterostructure |
| topic | niobium diselenide van der Waals heterostructure superconducting photodetector gate modulation |
| url | https://www.mdpi.com/2079-4991/13/3/421 |
| work_keys_str_mv | AT zijieji tunablephotoresponseinatwodimensionalsuperconductingheterostructure AT ruanzhang tunablephotoresponseinatwodimensionalsuperconductingheterostructure AT shuangxingzhu tunablephotoresponseinatwodimensionalsuperconductingheterostructure AT feifangu tunablephotoresponseinatwodimensionalsuperconductingheterostructure AT yunminjin tunablephotoresponseinatwodimensionalsuperconductingheterostructure AT binghexie tunablephotoresponseinatwodimensionalsuperconductingheterostructure AT jiaxinwu tunablephotoresponseinatwodimensionalsuperconductingheterostructure AT xinghancai tunablephotoresponseinatwodimensionalsuperconductingheterostructure |