Ehrlich-Schwoebel effect for organic molecules: Direct calculation of the step-edge barrier using empirical potentials
نویسندگان
چکیده
منابع مشابه
Edge Diffusion during Growth: The Kink Ehrlich-Schwoebel Effect and Resulting Instabilities
The morphology of surfaces of arbitrary orientation in the presence of step and kink EhrlichSchwoebel effects (SESE and KESE) during growth is studied within the framework of a model in which steps are continuous lines, and is illustrated by a simple solid-on-solid model. For vicinal surfaces KESE induces an instability often stronger than that from SESE. The possibility of stable kink flow gro...
متن کاملHigh-Order Surface Relaxation vs. the Ehrlich-Schwoebel Effect
We consider a class of continuum models of epitaxial growth of thin films with two competing mechanisms: (1) the surface relaxation described by high-order gradients of the surface profile; and (2) the Ehrlich-Schwoebel (ES) effect which is the asymmetry in the adatom attachment and detachment to and from atomic steps. Mathematically, these models are gradient-flows of some effective free-energ...
متن کاملthe use of appropriate madm model for ranking the vendors of mci equipments using fuzzy approach
abstract nowadays, the science of decision making has been paid to more attention due to the complexity of the problems of suppliers selection. as known, one of the efficient tools in economic and human resources development is the extension of communication networks in developing countries. so, the proper selection of suppliers of tc equipments is of concern very much. in this study, a ...
15 صفحه اولDifferent Regimes in the Ehrlich-Schwoebel Instability
A one-dimensional high-symmetry growing surface in presence of step-edge barriers is studied numerically and analytically, through a discrete /continuous model which neglects thermal detachment from steps. The morphology of the film at different times and/or different sizes of the sample is analyzed in the overall range of possible step-edge barriers: for a small barrier, we have a strong up-do...
متن کاملDetermination of the Ehrlich-Schwoebel barrier in epitaxial growth of thin films
We demonstrate an approach for determining the “effective” Ehrlich-Schwoebel ES step-edge barrier, an important kinetic constant to control the interlayer mass transport in epitaxial growth of thin films. The approach exploits the rate difference between the growth and/or decay of an adatom and a vacancy twodimensional island, which allows the “effective” ES barrier to be determined uniquely by...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2007
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.76.121302