3He Fluid Formed in One‐Dimensional 1.8 nm Pores Preplated with 4He Layer
3He Fluid Formed in One‐Dimensional 1.8 nm Pores Preplated with 4He Layer
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预镀 4He 层的一维 1.8 nm 孔中形成 3He 流体
DOI：
10.1063/1.2354706
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
N. Wada
中科院分区：
文献类型：
--
作者：
Y. Matsushita;T. Matsushita;R. Toda;M. Hieda;N. Wada
在直径1.8纳米的一维（1D）纳米孔中，预镀有1.2个4 He原子层，我们制成了直径估计约为1.0纳米的3 He膜管。在低的3He密度下，热容量显示出高温下的2D玻尔兹曼气体的热容量，随后在约300 mK处出现肖特基样峰。这个结果可以理解为随着温度的降低从2D到1D的维度交叉。该峰出现在3 He流体管中方位运动的基态和第一激发态之间能隙的0.3倍左右的温度处。
In one‐dimensional (1D) nanopores 1.8 nm in diameter preplated with 1.2 atomic layers of 4He, we have made 3He film tubes whose diameter is estimated to be about 1.0 nm. At a low 3He density, the heat capacity shows that of a 2D Boltzmann gas at high temperatures followed by a Schottky‐like peak at about 300 mK. This result can be understood in terms of dimensional crossover from 2D to 1D with decreasing temperature. The peak appears at a temperature about 0.3 times the energy gap between the ground state and the first excited states of the azimuthal motion in the 3He fluid tubes.