{"title":"Temperature-dependent properties of basic elements of all-NbN RSFQ circuits","authors":"","doi":"10.1016/j.physc.2024.1354569","DOIUrl":null,"url":null,"abstract":"<div><p>Rapid Single Flux Quantum (RSFQ) circuits are promising for energy-efficient and high-frequency digital applications. Energy consumption could be reduced effectively when RSFQ circuits operate at higher temperatures. We developed a fabrication process for all-NbN RSFQ circuits based on NbN/AlN/NbN Josephson junctions on single-crystal MgO substrates with the NbN ground layer on the top. The electrical properties of NbN junctions and NbN inductance were measured in the temperature range from 4.2 to 14 K. The NbN junction parameters decreased with an increase in temperature. The value of NbN inductance increased with an increase in temperature. The all-NbN Josephson Transmission Line (JTL) was designed, fabricated, and tested in the temperature range of 10 K. The result showed that the NbN-based JTL can work stable at 10 K. The margins were measured near 10 K.</p></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physica C-superconductivity and Its Applications","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921453424001333","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
Rapid Single Flux Quantum (RSFQ) circuits are promising for energy-efficient and high-frequency digital applications. Energy consumption could be reduced effectively when RSFQ circuits operate at higher temperatures. We developed a fabrication process for all-NbN RSFQ circuits based on NbN/AlN/NbN Josephson junctions on single-crystal MgO substrates with the NbN ground layer on the top. The electrical properties of NbN junctions and NbN inductance were measured in the temperature range from 4.2 to 14 K. The NbN junction parameters decreased with an increase in temperature. The value of NbN inductance increased with an increase in temperature. The all-NbN Josephson Transmission Line (JTL) was designed, fabricated, and tested in the temperature range of 10 K. The result showed that the NbN-based JTL can work stable at 10 K. The margins were measured near 10 K.
期刊介绍：
Physica C (Superconductivity and its Applications) publishes peer-reviewed papers on novel developments in the field of superconductivity. Topics include discovery of new superconducting materials and elucidation of their mechanisms, physics of vortex matter, enhancement of critical properties of superconductors, identification of novel properties and processing methods that improve their performance and promote new routes to applications of superconductivity.
The main goal of the journal is to publish:
1. Papers that substantially increase the understanding of the fundamental aspects and mechanisms of superconductivity and vortex matter through theoretical and experimental methods.
2. Papers that report on novel physical properties and processing of materials that substantially enhance their critical performance.
3. Papers that promote new or improved routes to applications of superconductivity and/or superconducting materials, and proof-of-concept novel proto-type superconducting devices.
The editors of the journal will select papers that are well written and based on thorough research that provide truly novel insights.
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