【摘 要】
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We investigate Si(100) surface morphology evolution under normal-incident Ar+ ions sputtering with low ion flux of 20μA/cm2. The results indicate that under th
【机 构】
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Department of Optical Science and Engineering, and State Key Laboratory for Advanced Photonic Materi
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We investigate Si(100) surface morphology evolution under normal-incident Ar+ ions sputtering with low ion flux of 20μA/cm2. The results indicate that under the low flux ion sputtering, the nanostructuring process of Si(100) is goveed by the Ehrlich-Schwoebel (ES) mechanism, rather than by the Bradley-Harper (BH) one for the case of high flux (normally the order of 102 μA/cm2 or larger). This work reveals that the ion flux plays an important role in the surface morphology evolution under ion sputtering, and a usually accepted classification that the ES mechanism is related to metal single-crystals under ion sputtering, while the BH one is to amorphous,and semiconductor targets is questionable.
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