Kosterlitz-Thouless superfluid transition for helium in packed powders
Kosterlitz-Thouless superfluid transition for helium in packed powders
复制标题
填充粉末中氦的 Kosterlitz-Thouless 超流体转变
DOI：
10.1103/physrevlett.53.691
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发表时间：
1984
影响因子：
8.6
通讯作者：
G. Williams
中科院分区：
文献类型：
--
作者：
V. Kotsubo;G. Williams
提出了吸附在球体表面的氦膜的Kosterlitz-Thouless超流转变模型。当球体直径减小到实验中使用的颗粒大小时，面超流体密度向零的急剧“跳跃”变宽并变得连续。将该模型应用于填充氧化铝粉末中的三次声测量，得到了成对涡旋的中心能量和中心半径。
A model is presented for the Kosterlitz-Thouless superfluid transition of helium films adsorbed on the surface of a sphere. As the sphere diameter is reduced to grain sizes used in experiments the sharp ''jump'' to zero of the areal superfluid density is broadened and becomes continuous. The model is applied to third-sound measurements in packed alumina powders, and values of the core energy and core radius of the paired vortices are extracted.