Origin of Repulsive Interactions between Bunched Steps on Vicinal Solid Surfaces
Origin of Repulsive Interactions between Bunched Steps on Vicinal Solid Surfaces
复制标题
邻近固体表面上聚集台阶之间排斥相互作用的起源
DOI：
10.1380/ejssnt.2015.231
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发表时间：
2015
影响因子：
0.7
通讯作者：
A. Oshiyama
中科院分区：
文献类型：
--
作者：
K. Sawada;J. Iwata;A. Oshiyama
我们使用第一原理方法研究了邻近固体表面上原子台阶之间排斥相互作用的起源。在 4H-SiC(0001) 邻近表面上形成的 (112̄n) 纳米面中发现了位于台阶边缘附近的特殊电子态。随着原子步骤之间距离的缩小，局域态在步骤之间逐渐重叠。从 (112̄n) 纳米面的能量学角度来看，预计原子台阶之间存在排斥相互作用。然后我们认为分布在阶梯边缘周围的电子之间的重叠是阶梯排斥相互作用的可能起源。 [DOI：10.1380/ejssnt.2015.231]
We investigate the origin of repulsive interactions between atomic steps on vicinal solid surfaces using a firstprinciples approach. Peculiar electronic states localized near step edges are found in (112̄n) nanofacets formed on the 4H-SiC(0001) vicinal surface. The localized states are gradually overlapped between the steps with shrinking the distance between atomic steps. From a viewpoint of energetics for (112̄n) nanofacets, the presence of the repulsive interaction between atomic steps is expected. We then suggest that the overlap between electrons distributed around step edges is a possible origin of the step-step repulsive interaction. [DOI: 10.1380/ejssnt.2015.231]