{"title":"零温极限下 $$^3$$ He 超流体中的开尔文-赫姆霍兹不稳定性","authors":"V. B. Eltsov, J. J. Hosio, M. Krusius","doi":"10.1007/s10909-024-03189-9","DOIUrl":null,"url":null,"abstract":"<div><p>In rotating <span>\\(^3\\)</span>He superfluids, the Kelvin–Helmholtz (KH) instability of the AB interface has been found to follow the theoretical model above <span>\\(0.4 \\, T_\\textrm{c}\\)</span>. A deviation from this dependence has been assumed possible at the lowest temperatures. Our NMR and thermal bolometer measurements down to <span>\\(0.2 \\, T_\\textrm{c}\\)</span> show that the critical KH rotation velocity follows the extrapolation from higher temperatures. We interpret this to mean that the KH instability is a bulk phenomenon and is not compromised by interactions with the wall of the rotating container, although weak pinning of the interface to the wall is observed during slow sweeping of the magnetic field. The KH measurement provides the only so far existing determination of the interfacial surface tension at temperatures down to <span>\\(0.2 \\, T_\\textrm{c}\\)</span> as a function of pressure.</p></div>","PeriodicalId":641,"journal":{"name":"Journal of Low Temperature Physics","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10909-024-03189-9.pdf","citationCount":"0","resultStr":"{\"title\":\"Kelvin–Helmholtz Instability in \\\\(^3\\\\)He Superfluids in Zero-Temperature Limit\",\"authors\":\"V. B. Eltsov, J. J. Hosio, M. Krusius\",\"doi\":\"10.1007/s10909-024-03189-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In rotating <span>\\\\(^3\\\\)</span>He superfluids, the Kelvin–Helmholtz (KH) instability of the AB interface has been found to follow the theoretical model above <span>\\\\(0.4 \\\\, T_\\\\textrm{c}\\\\)</span>. A deviation from this dependence has been assumed possible at the lowest temperatures. Our NMR and thermal bolometer measurements down to <span>\\\\(0.2 \\\\, T_\\\\textrm{c}\\\\)</span> show that the critical KH rotation velocity follows the extrapolation from higher temperatures. We interpret this to mean that the KH instability is a bulk phenomenon and is not compromised by interactions with the wall of the rotating container, although weak pinning of the interface to the wall is observed during slow sweeping of the magnetic field. The KH measurement provides the only so far existing determination of the interfacial surface tension at temperatures down to <span>\\\\(0.2 \\\\, T_\\\\textrm{c}\\\\)</span> as a function of pressure.</p></div>\",\"PeriodicalId\":641,\"journal\":{\"name\":\"Journal of Low Temperature Physics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2024-07-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s10909-024-03189-9.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Low Temperature Physics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10909-024-03189-9\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Low Temperature Physics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s10909-024-03189-9","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}
Kelvin–Helmholtz Instability in \(^3\)He Superfluids in Zero-Temperature Limit
In rotating \(^3\)He superfluids, the Kelvin–Helmholtz (KH) instability of the AB interface has been found to follow the theoretical model above \(0.4 \, T_\textrm{c}\). A deviation from this dependence has been assumed possible at the lowest temperatures. Our NMR and thermal bolometer measurements down to \(0.2 \, T_\textrm{c}\) show that the critical KH rotation velocity follows the extrapolation from higher temperatures. We interpret this to mean that the KH instability is a bulk phenomenon and is not compromised by interactions with the wall of the rotating container, although weak pinning of the interface to the wall is observed during slow sweeping of the magnetic field. The KH measurement provides the only so far existing determination of the interfacial surface tension at temperatures down to \(0.2 \, T_\textrm{c}\) as a function of pressure.
期刊介绍:
The Journal of Low Temperature Physics publishes original papers and review articles on all areas of low temperature physics and cryogenics, including theoretical and experimental contributions. Subject areas include: Quantum solids, liquids and gases; Superfluidity; Superconductivity; Condensed matter physics; Experimental techniques; The Journal encourages the submission of Rapid Communications and Special Issues.