Heat Capacity and Superfluid Density of Thin 4 He Films on Porous Gold and on H 2
Heat Capacity and Superfluid Density of Thin 4 He Films on Porous Gold and on H 2
复制标题
多孔金和 H 2 上 4 He 薄膜的热容和超流体密度
DOI：
10.1103/physrevlett.80.4482
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发表时间：
1998
影响因子：
8.6
通讯作者：
M. Chan
中科院分区：
文献类型：
--
作者：
G. Csáthy;D. Tulimieri;Jongsoo Yoon;M. Chan
我们同时测量了多孔金和预镀金上的薄膜的超流密度和热容。当温度接近转变温度${T}{c}$时，超流体密度表现出从类2D到3D的交叉行为。在这两种衬底上，我们都观察到了与远低于${T}_{c}$的超流层相关联的意外热容特征。
We report simultaneous measurement of the superfluid density and heat capacity of thin ${}^{4}\mathrm{He}$ films on porous gold and on gold preplated with ${\mathrm{H}}_{2}$. The superfluid density shows a crossover from 2D-like to 3D critical behavior for temperatures close to ${T}_{c}$, the transition temperature. On both substrates we observe an unexpected heat capacity signature associated with the superfluid layer well below ${T}_{c}$.