Anomalous suppression of superfluidity for 4He in Gelsil glass
Anomalous suppression of superfluidity for 4He in Gelsil glass
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Gelsil 玻璃中 4He 超流性的反常抑制
DOI：
10.1088/1742-6596/400/1/012048
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Masaru Suzuki and Keiya Shirahama
中科院分区：
文献类型：
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作者：
Kouetsu Mikami;Toshiaki Kobayashi;Junko Taniguchi;Masaru Suzuki and Keiya Shirahama
本文研究了三种凝胶玻璃样品中液体4 - He的超流体行为，并通过测量n2压力等温线对其孔径分布进行了研究。结果表明，孔径在6 nm左右的样品在饱和蒸汽压下的超流体转变温度为1.37 K，孔径分布在4 nm以上的样品在饱和蒸汽压下的超流体转变温度为0.83 K。两个样本都有相同大小的瓶颈结构。这些结果表明，超流动性的抑制与孔隙大小分布有关，而不是与颈部大小有关。
We have studied the superfluid behavior of liquid 4 He confined in three samples of Gelsil glass, whose pore size distribution was examined by measuring N 2 pressure isotherm. It was found that the superfluid transition temperature under the saturation vapor pressure is 1.37 K for one of the samples whose pore size ranges up to around 6 nm, while it is 0.83 K for another one in which the distribution of pore size is small above 4 nm. Both of the samples have a bottleneck structure of the same size. These results demonstrate that the suppression of superfluidity is related to the pore size distribution rather than the size of the neck.