具有矩形对称性的纳米晶体的低摩擦表面滑动的稳定性及其对W在NaF（001）上的应用
Stability of low-friction surface sliding of nanocrystals with rectangular symmetry and application to W on NaF(001)
摘要：
本文研究了原子在矩形晶格上矩形排列的双原子系统低摩擦滑动的稳定性，得到了解析结果。我们发现，存在几个无公度周期轨道，并对热涨落和其他扰动是稳定的。由于无公度取向导致低摩擦，因此低摩擦，这种无公度周期性轨道对于纳米摩擦学的研究是有趣的。分析结果与在NaF（001）上的W纳米晶体的模拟非常好地比较。与典型的六边形晶格（例如石墨）相比，具有正方形晶格的基板的几何形状和高典型的介电常数增加了鲁棒性。
英文摘要：
We investigate the stability of low-friction sliding of nanocrystal with rectangular atomic arrangement on rectangular lattices, for which analytical results can be obtained. We find that several incommensurate periodic orbits exist and are stable against thermal fluctuations and other perturbations. As incommensurate orientations lead to low corrugation, and therefore low friction, such incommensurate periodic orbits are interesting for the study of nanotribology. The analytical results compare very well with simulations of W nanocrystals on NaF(001). The geometry and high typical corrugation of substrates with square lattices increase the robustness compared to typical hexagonal lattices, such as graphite.
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