论文标题
薄薄的$^4 $ He在石墨上拍摄的特定热量
Specific heat of thin $^4$He films on graphite
论文作者
论文摘要
通过量子蒙特卡洛模拟，估计在石墨底物上吸附的两层HE-4膜的比热估计是温度的函数。结果与最近的实验观察结果一致，因为它们广泛地重现其最重要的特征。但是，均未观察到“超olid”和“超流体六角形”阶段，其中据称是证据。有人认为，仅热容量测量可能不是该系统中结构和超流体过渡的良好预测指标，因为它们的解释通常是模棱两可的。
The specific heat of a two-layer He-4 film adsorbed on a graphite substrate is estimated as a function of temperature by Quantum Monte Carlo simulations. The results are consistent with recent experimental observations, in that they broadly reproduce their most important features. However, neither the "supersolid" nor the "superfluid hexatic" phases, of which experimental data are claimed to be evidence, are observed. It is contended that heat capacity measurements alone may not be a good predictor of structural and superfluid transitions in this system, as their interpretation is often ambiguous.
