Observation of weak coupling effects in Ba0.6K0.4Fe2As2 junctions patterned across a naturally formed grain boundary
DC Field | Value | Language |
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dc.contributor.author | Hong, Sung-Hak | - |
dc.contributor.author | Lee, Nam Hoon | - |
dc.contributor.author | Kang, Won Nam | - |
dc.contributor.author | Lee, Soon-Gul | - |
dc.date.accessioned | 2021-09-05T09:07:25Z | - |
dc.date.available | 2021-09-05T09:07:25Z | - |
dc.date.created | 2021-06-15 | - |
dc.date.issued | 2014-05 | - |
dc.identifier.issn | 0953-2048 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/98615 | - |
dc.description.abstract | We have fabricated intergrain nanobridge junctions from a Ba0.6K0.4Fe2As2 film and observed their weak coupling effects. We prepared the junction by patterning a nanobridge across a natural grain boundary by using a focused ion beam etching technique and studied their superconducting transition properties. The resistive transition showed three steps: the transitions of the bulk, the microbridge, and the junction grain boundary. Current-voltage curves showed typical Josephson junction characteristics, well-matched with the model of a resistively shunted junction incorporated with thermal fluctuations. Fitting data to theory revealed much larger current fluctuations than expected from the Johnson-Nyquist theorem. The junction showed a linear temperature dependence of the critical current and a constant normal-state resistance, indicating that the grain boundary played a role as a tunnel barrier with a very poor conductance. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | IOP PUBLISHING LTD | - |
dc.subject | IRON | - |
dc.subject | SUPERCONDUCTIVITY | - |
dc.title | Observation of weak coupling effects in Ba0.6K0.4Fe2As2 junctions patterned across a naturally formed grain boundary | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Soon-Gul | - |
dc.identifier.doi | 10.1088/0953-2048/27/5/055007 | - |
dc.identifier.wosid | 000335385200007 | - |
dc.identifier.bibliographicCitation | SUPERCONDUCTOR SCIENCE & TECHNOLOGY, v.27, no.5 | - |
dc.relation.isPartOf | SUPERCONDUCTOR SCIENCE & TECHNOLOGY | - |
dc.citation.title | SUPERCONDUCTOR SCIENCE & TECHNOLOGY | - |
dc.citation.volume | 27 | - |
dc.citation.number | 5 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.relation.journalWebOfScienceCategory | Physics, Condensed Matter | - |
dc.subject.keywordPlus | IRON | - |
dc.subject.keywordPlus | SUPERCONDUCTIVITY | - |
dc.subject.keywordAuthor | Ba0.6K0.4Fe2As2 | - |
dc.subject.keywordAuthor | grain boundary | - |
dc.subject.keywordAuthor | superconductor junction | - |
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