Superfluid transition of He-4 in porous gold

被引：50
|
作者：
Yoon, J
Chan, MHW
机构：
[1] Department of Physics, Pennsylvania State University, University Park, PA
来源：
PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 25期
关键词：
D O I：
10.1103/PhysRevLett.78.4801
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have measured the superfluid density and the heat capacity of He-4 confined in porous gold in order to study the effect of quenched disorder on the superfluid transition. The superfluid density exponent is found to be identical to that of bulk He-4 within experimental resolution The heat capacity shows a sharp peak at the transition temperature. The size of the peak appears to be larger than that predicted by critical phenomena theory.
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页码：4801 / 4804
页数：4
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