Third-sound study of a layered superfluid film.
Third-sound study of a layered superfluid film.
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分层超流膜的第三声研究。
DOI：
10.1103/physrevlett.68.60
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发表时间：
1992
影响因子：
8.6
通讯作者：
Chan
中科院分区：
文献类型：
--
作者：
Zimmerli;Mistura;Chan
第三声速的等温扫描作为{sup 4}石墨上He覆盖的函数显示出明显的倾斜积分层周期性。支持第三种声音所需的石墨上的最小{sup 4}He覆盖近三层。热容等温线在地层完成时表现出最小值，但没有与超流体开始有关的明显特征。在1k以下的高分辨率吸附等温线表明，{sup 4}He膜是一层一层生长的，至少有7层。
Isothermal scans of third-sound velocity as a function of {sup 4}He coverage on graphite exhibit pronounced dips integral layer periodicity. The minimum {sup 4}He coverage on graphite needed to support third sound is nearly three layers. The heat-capacity isotherm exhibits minima at layer completion but there is no noticeable feature related to the onset of superfluidity. High-resolution adsorption isotherms below 1 K show that {sup 4}He film grows layer by layer through at least seven layers.