Suppression of the critical current and the superfluid transition temperature of3He in a single submicron cylindrical channel
Suppression of the critical current and the superfluid transition temperature of3He in a single submicron cylindrical channel
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单个亚微米圆柱形通道中3He临界电流和超流转变温度的抑制
DOI：
10.1007/bf01070649
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
R. Packard
中科院分区：
文献类型：
--
作者：
J. Pekola;J. C. Davis;Zhu Yu;R. Spohr;P. Price;R. Packard
我们报告了对单个圆柱形通道中超流体 3He 的受限几何效应和临界电流的研究。通道的直径为 0.7 µm，与（与温度相关的）相干长度相当，其纵横比为 ∼10。临界温度的降低表明微通道固体壁上的漫散射。使用 Ginzburg-Landau 公式，我们推导了具有圆形横截面的无限长圆柱形小通道中的临界电流和临界温度模型。测量到的这些数量的减少与模型的预测相当一致。
We report on an investigation into confined geometry effects and critical currents of superfluid3He in a single circular cylindrical channel. The diameter of the channel, 0.7 µm, is of the order of the (temperature-dependent) coherence length and its aspect ratio is ∼10. The reduction of the critical temperature demonstrates diffuse scattering on the solid walls of the microchannel. Using the Ginzburg-Landau formulation, we derive a model for the critical current and the critical temperature in a small, infinitely long, cylindrical channel with a circular cross section. The measured reductions of these quantities are in reasonable agreement with the predictions of the model.