电迁移诱导台阶聚束过程中邻面台阶的非守恒动力学
Non-conserved dynamics of steps on vicinal surfaces during electromigration-induced step bunching
摘要：
我们报告的非保守动力学的平行步骤邻面升华的情况下，电迁移和步骤步骤的相互作用的新结果。导出的方程在准静态近似和极限$f^{-1}\gg l_D\gg l_{\pm} \gg l_i$下是有效的，其中$f$是逆电迁移长度，$l_D$是扩散长度，$l_{\pm}$是动力学长度，$l_i$是平台宽度。晶体升华和步-步相互作用之间的耦合导致运动方程中的非线性、非保守项。取决于初始条件，这导致阶跃束的中断粗化、反粗化或不同束数的阶跃列之间的周期性切换。
英文摘要：
We report new results on the non-conserved dynamics of parallel steps on vicinal surfaces in the case of sublimation with electromigration and step-step interactions. The derived equations are valid in the quasistatic approximation and in the limit $f^{-1}\gg l_D\gg l_{\pm} \gg l_i$, where $f$ is the inverse electromigration length, $l_D$ the diffusion length, $l_{\pm}$ the kinetic lengths and $l_i$ the terrace widths. The coupling between crystal sublimation and step-step interactions induces non-linear, non-conservative terms in the equations of motion. Depending on the initial conditions, this leads to interrupted coarsening, anticoarsening of step bunches or periodic switching between step trains of different numbers of bunches.
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