Thermal step bunching and interstep attraction on the vicinal surface with adsorption
Thermal step bunching and interstep attraction on the vicinal surface with adsorption
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DOI：
10.1103/physrevb.67.125407
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发表时间：
2003-03-15
影响因子：
3.7
通讯作者：
Yamamoto, T
中科院分区：
文献类型：
--
作者：
Akutsu, N;Akutsu, Y;Yamamoto, T
本文研究了具有吸附的邻位面的统计化学行为。我们考虑的情况下，有吸引力的吸附物之间的横向相互作用是存在的，这会导致热阶聚束。作为微观模型的哈密顿量的邻面吸附，我们采用了一个限制固体固体模型耦合伊辛系统。使用密度矩阵重整化群算法，我们得到的表面自由能和吸附覆盖率作为表面斜率p的函数。我们推导出的步骤张力和步骤的相互作用系数从自由能。我们澄清的起源的热步骤聚束和吸附介导的步间吸引力。
We study statistical thermodynamical behavior of the vicinal surface with adsorption. We consider the case where attractive lateral interactions between adsorbates are present, which cause the thermal step bunching. As the microscopic model Hamiltonian for the vicinal surface with adsorption, we adopt a restricted-solid-on-solid model coupled with the Ising system. Using the density-matrix renormalization group algorithm, we obtain surface-free energy and adsorption coverage as functions of the surface slope p. We derive the step tension and the step-interaction coefficient from the free energy. We clarify the origin of the thermal step bunching and the adsorbate-mediated interstep attraction.