Please use this identifier to cite or link to this item:
https://scholarbank.nus.edu.sg/handle/10635/224557
DC Field | Value | |
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dc.title | TRANSPORT MEASUREMENT AND SCANNING IMAGING ON TWO DIMENSIONAL MATERIALS | |
dc.contributor.author | ZHAO JINPEI | |
dc.date.accessioned | 2022-04-30T18:00:20Z | |
dc.date.available | 2022-04-30T18:00:20Z | |
dc.date.issued | 2021-08-21 | |
dc.identifier.citation | ZHAO JINPEI (2021-08-21). TRANSPORT MEASUREMENT AND SCANNING IMAGING ON TWO DIMENSIONAL MATERIALS. ScholarBank@NUS Repository. | |
dc.identifier.uri | https://scholarbank.nus.edu.sg/handle/10635/224557 | |
dc.description.abstract | ππππ2 is a type II superconductor with its superconductivity preserved from bulk all the way down to one atomic layer. We used both electrochemical and mechanical exfoliation to fabricate twisted atomic-layer ππππ2 devices with high quality. In those devices, we observed exotic features which are not expected in pristine isotropic superconductors. The critical current of such twisted ππππ2 showed oscillatory behavior under out-of-plane magnetic field, which we attributed to the formation of Josephson junction array aided by moirΓ© superlattice. To uncover the microscopic picture of vortex configuration in twisted ππππ2, we developed a new scanning probe measurement technique based on the single electron transistor. We have achieved ~100 ππ spatial resolution and ~30 ππ voltage sensitivity in our setup. We demonstrated the operability and validity of this scanning SET probe by approaching 2D πππ2 and measuring its surface potential and electronic compressibility. | |
dc.language.iso | en | |
dc.subject | 2D materials,twistronics,superconductivity,transport,single electron transistor,compressibility | |
dc.type | Thesis | |
dc.contributor.department | PHYSICS | |
dc.contributor.supervisor | Chorng Haur Sow | |
dc.contributor.supervisor | JENS MARTIN | |
dc.contributor.supervisor | Konstantin Sergeevich Novoselov | |
dc.description.degree | Ph.D | |
dc.description.degreeconferred | DOCTOR OF PHILOSOPHY (FOS) | |
Appears in Collections: | Ph.D Theses (Open) |
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File | Description | Size | Format | Access Settings | Version | |
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Zhao Jinpei.pdf | 5.79 MB | Adobe PDF | OPEN | None | View/Download |
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