Thinning of superfluid films below the critical point.
Thinning of superfluid films below the critical point.
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超流膜在临界点以下变薄。
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Lincoln Chayes
中科院分区：
文献类型：
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作者：
R. Zandi;Aviva Shackell;J. Rudnick;M. Kardar;Lincoln Chayes
在4He薄膜上的实验表明，在块体的兰姆达点和超流区有一种吸引人的类Casimir力。以前的工作已经解释了在波长转变处和超流区深处的这种力的大小，但没有解释紧接在波长点下方的实质性吸引力。利用由临界涨落重整化的简单平均场计算，我们得到了与由实验数据崩塌得到的标度函数vartheta定性一致的有效Casimir力。
Experiments on 4He films reveal an attractive Casimir-like force at the bulk lambda point and in the superfluid regime. Previous work has explained the magnitude of this force at the lambda transition and deep in the superfluid region but not the substantial attractive force immediately below the lambda point. Utilizing a simple mean-field calculation renormalized by critical fluctuations we obtain an effective Casimir force that is qualitatively consistent with the scaling function vartheta obtained by collapse of experimental data.