title: Ion beam-generated surface ripples: new insight in the underlying mechanism.
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.
authors.affiliation: Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, 110067, India. tkdeswal@gmail.com.
authors.forename: Tanuj
authors.initials: T
authors.lastname: Kumar
authors.forename: Ashish
authors.initials: A
authors.lastname: Kumar
authors.forename: Dinesh Chander
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authors.lastname: Agarwal
authors.forename: Nirnajan Prasad
authors.initials: NP
authors.lastname: Lalla
authors.forename: Dinakar
authors.initials: D
authors.lastname: Kanjilal
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