DC Field | Value | Language |
---|---|---|
dc.contributor.author | Park, Dongsung T. | ko |
dc.contributor.author | Lee, Seokyeong | ko |
dc.contributor.author | Kim, Uhjin | ko |
dc.contributor.author | Choi, Hyoungsoon | ko |
dc.contributor.author | Choi, Hyung Kook | ko |
dc.date.accessioned | 2020-12-22T09:10:05Z | - |
dc.date.available | 2020-12-22T09:10:05Z | - |
dc.date.created | 2020-11-26 | - |
dc.date.issued | 2020-11 | - |
dc.identifier.citation | SCIENTIFIC REPORTS, v.10, no.1, pp.19746 | - |
dc.identifier.issn | 2045-2322 | - |
dc.identifier.uri | http://hdl.handle.net/10203/278914 | - |
dc.description.abstract | Quantum point contacts (QPC) are a primary component in mesoscopic physics and have come to serve various purposes in modern quantum devices. However, fabricating a QPC that operates robustly under extreme conditions, such as high bias or magnetic fields, still remains an important challenge. As a solution, we have analyzed the trench-gated QPC (t-QPC) that has a central gate in addition to the split-gate structure used in conventional QPCs (c-QPC). From simulation and modelling, we predicted that the t-QPC has larger and more even subband spacings over a wider range of transmission when compared to the c-QPC. After an experimental verification, the two QPCs were investigated in the quantum Hall regimes as well. At high fields, the maximally available conductance was achievable in the t-QPC due to the local carrier density modulation by the trench gate. Furthermore, the t-QPC presented less anomalies in its DC bias dependence, indicating a possible suppression of impurity effects. | - |
dc.language | English | - |
dc.publisher | NATURE RESEARCH | - |
dc.title | Robust quantum point contact via trench gate modulation | - |
dc.type | Article | - |
dc.identifier.wosid | 000595255700139 | - |
dc.identifier.scopusid | 2-s2.0-85095866740 | - |
dc.type.rims | ART | - |
dc.citation.volume | 10 | - |
dc.citation.issue | 1 | - |
dc.citation.beginningpage | 19746 | - |
dc.citation.publicationname | SCIENTIFIC REPORTS | - |
dc.identifier.doi | 10.1038/s41598-020-76790-z | - |
dc.contributor.localauthor | Choi, Hyoungsoon | - |
dc.contributor.nonIdAuthor | Kim, Uhjin | - |
dc.contributor.nonIdAuthor | Choi, Hyung Kook | - |
dc.description.isOpenAccess | Y | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | QUANTIZED CONDUCTANCE | - |
dc.subject.keywordPlus | BALLISTIC TRANSPORT | - |
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