零温极限下 $$^3$$ He 超流体中的开尔文-赫姆霍兹不稳定性

IF 1.1 3区 物理与天体物理 Q4 PHYSICS, APPLIED Journal of Low Temperature Physics Pub Date : 2024-07-24 DOI:10.1007/s10909-024-03189-9
V. B. Eltsov, J. J. Hosio, M. Krusius
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引用次数: 0

摘要

在旋转的(^3\)He超流体中,已经发现AB界面的开尔文-赫尔姆霍兹(KH)不稳定性在(0.4\, T_\textrm{c}\)以上遵循理论模型。我们假定在最低温度下可能会偏离这一依赖性。我们对低至(0.2 \,T_\textrm{c}\)温度下的核磁共振和热波计测量结果表明,临界KH旋转速度与较高温度下的外推结果一致。我们认为这意味着KH不稳定性是一种体态现象,不会因为与旋转容器壁的相互作用而受到影响,尽管在磁场缓慢扫描过程中观察到了界面与容器壁的微弱钉合。KH 测量提供了迄今为止唯一的低至(0.2 \,T_\textrm{c}\)温度下界面表面张力随压力变化的测定结果。
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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.

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来源期刊
Journal of Low Temperature Physics
Journal of Low Temperature Physics 物理-物理:凝聚态物理
CiteScore
3.30
自引率
25.00%
发文量
245
审稿时长
1 months
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.
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