脉冲Laser沉积速率方程和标度
Rate Equations and Scaling in Pulsed Laser Deposition
摘要：
我们研究了脉冲激光沉积的简化模型[Phys. Rev. Lett. { \bf 87}，135701（2001）]通过速率方程。我们考虑一组方程，其中岛屿被假定为点状的，以及一个改进的，考虑到岛屿的大小。第一组方程被精确求解，但其预测能力仅限于几个脉冲。改进后的方程组进行了数值积分，与模拟结果非常吻合，并充分考虑了从连续到脉冲沉积的交叉。此外，我们分析了成核密度的缩放，并显示数值结果表明，以前观察到的对数缩放不适用。
英文摘要：
We study a simplified model for pulsed laser deposition [Phys. Rev. Lett. {\bf 87}, 135701 (2001)] by rate equations. We consider a set of equations, where islands are assumed to be point-like, as well as an improved one that takes the size of the islands into account. The first set of equations is solved exactly but its predictive power is restricted to a few pulses. The improved set of equations is integrated numerically, is in excellent agreement with simulations, and fully accounts for the crossover from continuous to pulsed deposition. Moreover, we analyze the scaling of the nucleation density and show numerical results indicating that a previously observed logarithmic scaling does not apply.
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