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arXiv 2407.12436cond-mat.other
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3He在分子氢表面上的吸附

3He adsorbed on molecular hydrogen surfaces

M. C. Gordillo, J. Boronat

AI总结:

本研究采用扩散蒙特卡洛方法计算了3He在石墨上分子氢同位素固体层上的相图,发现二维气体与更稳定的7/12公度结构平衡,与实验数据吻合。

摘要:

使用扩散蒙特卡洛(DMC)技术,我们计算了3He吸附在石墨上分子氢同位素(H2、HD和D2)的第一固体层上的相图。所有情况下的结果在定性上相似:一个二维气体从无限稀释极限延伸至第二层氦密度为0.048±0.004 Å⁻²。该气体与7/12公度结构处于平衡状态,该结构比任何类似密度的非公度三角固体更稳定。这些发现与可获得的实验数据相当吻合。

英文摘要:

Using a diffusion Monte Carlo (DMC) technique, we calculated the phase diagram of 3He adsorbed on a first solid layer of a molecular hydrogen isotope (H2,HD and D2) on top of graphite. The results are qualitatively similar in all cases: a two-dimensional gas spanning from the infinite dilution limit to a second-layer helium density of 0.048 +/- 0.004 Ang^{-2}. That gas is in equilibrium with a 7/12 commensurate structure, more stable than any incommensurate triangular solid of similar density. These findings are in reasonably good agreement with available experimental data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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