Highly ordered square arrays of nanoscale pyramids produced by ion bombardment of a crystalline binary material.
Phys Rev E
; 93(3): 032207, 2016 Mar.
Article
en En
| MEDLINE
| ID: mdl-27078344
ABSTRACT
A theory is developed for the nanoscale patterns formed when the (001) surface of a crystalline binary material with fourfold rotational symmetry is subjected to normal-incidence ion bombardment. The deterministic nonlinear continuum equations account for the Ehrlich-Schwoebel barrier, which produces uphill atomic currents on the crystal surface. We demonstrate that highly ordered square arrays of nanopyramids can form in a certain region of parameter space. An Ehrlich-Schwoebel barrier is required for patterns of this kind to develop. For another range of parameters, a disordered square array of nanodots forms and the pattern coarsens over time.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Phys Rev E
Año:
2016
Tipo del documento:
Article
País de afiliación:
Estados Unidos