Morphology change of the silicon surface induced by Ar$^+$ ion beam sputtering

TL;DR

This paper presents a two-level modeling approach to understand nanoscale pattern formation on silicon surfaces caused by Ar$^+$ ion sputtering, including phase diagrams, scaling laws, and surface roughness analysis.

Contribution

It introduces a novel two-level model for nanoscale pattern formation on silicon during ion sputtering, providing phase diagrams and scaling laws.

Findings

Phase diagram of possible surface patterns

Dependence of structure wavelength on ion energy

Growth and roughness exponents in different regimes

Abstract

Two-level modeling for nanoscale pattern formation on silicon target by Ar$^+$ ion sputtering is presented. Phase diagram illustrating possible nanosize surface patterns is discussed. Scaling characteristics for the structure wavelength dependence versus incoming ion energy are defined. Growth and roughness exponents in different domains of the phase diagram are obtained.