纳米尺度的应力工程：双组分吸附层条带
Stress engineering at the nanometer scale: Two-component adlayer stripes
摘要：
在各种系统中广泛观察到具有长程序的自发形成的平衡纳米粒子，但是它们显著的温度依赖性仍然是保持这种图案远离形成温度的障碍。在这里，我们报告了一个高度有序的应力诱导条纹图案的双组分，Pd-O，吸附单分子层W（110），在高温下产生的和相同的保存在较低的温度。该图案显示了可调的周期（低至16 nm）和取向，正如连续模型理论所预测的那样，在我们的DFT计算中发现了表面应力及其各向异性。在条纹形成过程中的热波动的控制是基于在高密度格子气中的遍历性的中断/恢复，当关闭/打开与热浴的颗粒交换时，具有长程相互作用。
英文摘要：
Spontaneously formed equilibrium nanopatterns with long-range order are widely observed in a variety of systems, but their pronounced temperature dependence remains an impediment to maintain such patterns away from the temperature of formation. Here, we report on a highly ordered stress-induced stripe pattern in a two-component, Pd-O, adsorbate monolayer on W(110), produced at high temperature and identically preserved at lower temperatures. The pattern shows a tunable period (down to 16 nm) and orientation, as predicted by a continuum model theory along with the surface stress and its anisotropy found in our DFT calculations. The control over thermal fluctuations in the stripe formation process is based on the breaking/restoring of ergodicity in a high-density lattice gas with long-range interactions upon turning off/on particle exchange with a heat bath.
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