Interfacial states and far-from-equilibrium transitions in the epitaxial growth and erosion on (110) crystal surfaces.
Interfacial states and far-from-equilibrium transitions in the epitaxial growth and erosion on (110) crystal surfaces.
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DOI：
10.1103/physreve.74.061601
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发表时间：
2006-12
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影响因子：
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通讯作者：
Artem Levandovsky;L. Golubović;D. Moldovan
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文献类型：
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作者：
Artem Levandovsky;L. Golubović;D. Moldovan
本文讨论了多层膜同质外延生长中的远离平衡界面现象和（110）晶体表面的腐蚀。在实验上，这些矩形对称表面表现出许多有趣的非平衡界面结构，例如在高对称性（100）和（111）晶体表面上的同质外延生长和侵蚀中不存在的波纹一维周期态。在一个统一的唯象模型中，我们揭示和阐明了（110）面上的众多态以及它们之间的跃迁。通过分析和数值模拟，我们解决了实验观察到的（110）表面上的两种类型的波纹态之间的转换。我们讨论了几个中间接口状态干预，通过连续的过渡，两个波纹状态之间。其中之一是菱形金字塔状态，理论上由Golubovic [Phys. Rev. Lett. 89，266104（2002）]，随后由de Mongeot及其同事在Cu（110）和Rh（110）表面的外延侵蚀中观察到[A. Molle，Phys. Rev. Lett. 93，256103（2004）和A. Molle，Phys. Rev. B 73，155418（2006）]。此外，我们发现了一些有趣的中间状态之间的波纹和金字塔状态的结构特性。其中最突出的是最近在Ag（110）表面上看到的长屋顶状物体（小屋）的矩形波纹状态。我们还预测存在一个引人注目的界面结构，进行非零，持续的表面电流。在这种所谓的屈曲波纹界面态中形成的周期性表面流涡格是流体动力系统中自组织对流流型的一种远离平衡态的相对形式。本文讨论了（110）晶体表面多个界面态的粗化生长。
We discuss the far-from-equilibrium interfacial phenomena occurring in the multilayer homoepitaxial growth and erosion on (110) crystal surfaces. Experimentally, these rectangular symmetry surfaces exhibit a multitude of interesting nonequilibrium interfacial structures, such as the rippled one-dimensional periodic states that are not present in the homoepitaxial growth and erosion on the high symmetry (100) and (111) crystal surfaces. Within a unified phenomenological model, we reveal and elucidate this multitude of states on (110) surfaces as well as the transitions between them. By analytic arguments and numerical simulations, we address experimentally observed transitions between two types of rippled states on (110) surfaces. We discuss several intermediary interface states intervening, via consecutive transitions, between the two rippled states. One of them is the rhomboidal pyramid state, theoretically predicted by Golubovic [Phys. Rev. Lett. 89, 266104 (2002)] and subsequently seen, by de Mongeot and co-workers, in the epitaxial erosion of Cu(110) and Rh(110) surfaces [A. Molle, Phys. Rev. Lett. 93, 256103 (2004), and A. Molle, Phys. Rev. B 73, 155418 (2006)]. In addition, we find a number of interesting intermediary states having structural properties somewhere between those of rippled and pyramidal states. Prominent among them are the rectangular rippled states of long rooflike objects (huts) recently seen on Ag(110) surface. We also predict the existence of a striking interfacial structure that carries nonzero, persistent surface currents. Periodic surface currents vortex lattice formed in this so-called buckled rippled interface state is a far-from-equilibrium relative of the self-organized convective flow patterns in hydrodynamic systems. We discuss the coarsening growth of the multitude of the interfacial states on (110) crystal surfaces.