A density functional model for the surface properties of liquid 4He
A density functional model for the surface properties of liquid 4He
复制标题
液体 4He 表面特性的密度泛函模型
DOI：
10.1088/0953-8984/4/3/008
复制
发表时间：
1992
期刊：
影响因子：
--
通讯作者：
X. Viñas
中科院分区：
文献类型：
--
作者：
A. Guirao;M. Centelles;M. Barranco;M. Pi;A. Polls;X. Viñas
提出了一种密度泛函方法来研究4He液气界面。根据粒子密度和温度对自由能密度进行了调整，以再现液气共存线上的液体密度和蒸汽压，以及零温度表面张力。在较好地描述了相变后，计算得到的表面张力与实验结果吻合较好。计算出的密度分布用于讨论最近的表面厚度的实验测定。
A density functional approach is proposed to study the 4He liquid-gas interface. The free energy density, which depends on the particle density and temperature, has been adjusted to reproduce the liquid density and the vapour pressure along the liquid-gas coexistence line, as well as the zero-temperature surface tension. After achieving a fairly good description of the phase transition, the calculated surface tension agrees well with the experimental results. The calculated density profile is used to discuss a recent experimental determination of the surface thickness.