Ion beam-generated surface ripples: new insight in the underlying mechanism |
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Authors: | Tanuj Kumar Ashish Kumar Dinesh Chander Agarwal Nirnajan Prasad Lalla Dinakar Kanjilal |
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Affiliation: | 1.Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, 110067, India;2.Indian Institute of Technology Delhi Hauz-Khas, New Delhi, 110016, India;3.UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore, 452017, India |
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Abstract: | A new hydrodynamic mechanism is proposed for the ion beam-induced surface patterning on solid surfaces. Unlike the standard mechanisms based on the ion beam impact-generated erosion and mass redistribution at the free surface (proposed by Bradley-Harper and its extended theories), the new mechanism proposes that the incompressible solid flow in amorphous layer leads to the formation of ripple patterns at the amorphous-crystalline (a/c) interface and hence at the free surface. Ion beam-stimulated solid flow inside the amorphous layer probably controls the wavelength, whereas the amount of material transported and re-deposited at a/c interface control the amplitude of ripples. |
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Keywords: | Ion beam Ripples TEM AFM |
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