arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0707.0849cond-mat.mtrl-scicond-mat.soft
收藏

原子在准晶衬底上沉积的三维分子动力学研究

Deposition of Atoms on a Quasicrystalline Substrate: Molecular-Dynamics Study in 3 Dimensions

Muhittin Mungan, Yves Weisskopf, Mehmet Erbudak

摘要:

我们研究了原子沉积在具有十次准晶有序的衬底上时三维结构的形成。分子动力学计算表明,吸附层由有序的纳米尺度域与基本基板的对称性决定的方向。取决于吸附物原子彼此之间以及与基底原子之间的相互作用的相对强度,观察到从逐层生长到团簇形成的不同形态。我们还发现,膜厚度同样影响生长膜的整体结构:取决于吸附物原子之间的相互作用的相对强度,最接近衬底的吸附物层的配置的结构转变可以发生作为沉积层的数量增加。

英文摘要:

We study the three-dimensional structure formation when atoms are deposited onto a substrate with a decagonal quasicrystalline order. Molecular-dynamicscalculations show that the adsorbate layer consists of ordered nano-scale domains with orientations determined by the underlying substrate symmetry. Depending on the relative strength of the interactions of adsorbate atoms with each other and with the substrate atoms, different morphologies are observed ranging from layer-by-layer growth to cluster formation. We also find that the film thickness likewise affects the overall structure of the growing film: Depending on the relative strength of the interaction between adsorbate atoms, a structural transition of the configuration of the adsorbate layers closest to the substrate can occur as the number of deposited layers increases.

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。

↑