Abnormal surface diffusion of particles under the action of an external time-periodic force

18th International Summer School on Vacuum, Electron and Ion Technologies

Marchenko, I.G.^1,2 ; Marchenko, I.I.^3

NSC, Kharkov Institute of Physics and Technology, 1 Akademicheskaya Str., 61108 Kharkov, Ukraine^1

Kharkov National University, 4 Svobody Sq., 61077 Kharkov, Ukraine^2

NTU, Kharkov Polytechnic Institute, 21 Frunze, 61145 Kharkov, Ukraine^3

关键词: Diffusion enhancement;    External fields;    Gain Ratio;    Orders of magnitude;    Periodic forces;    Surface temperatures;    Time-periodic fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/514/1/012045/pdf
DOI  :  10.1088/1742-6596/514/1/012045

来源: IOP

【 摘 要 】

This paper delves into the abnormal surface diffusion of particles in an external time-periodic field. The relationship is studied of the surface diffusion enhancement as a function of the amplitude and frequency of external fields. It is shown that the diffusion coefficient can be significantly increased (by several orders of magnitude) by applying external time-periodic fields. The diffusion gain ratio stronglly depends on the surface temperature and on the external field amplitude and frequency.