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pro vyhledávání: '"Ratsch, C."'
Calculations of the potential energy surface for tracer Ga and In adatoms above three GaAs (111)A surface reconstructions are presented in order to understand the growth conditions required to form axial heterostructures in GaAs/InGaAs nano-pillars.
Externí odkaz:
http://arxiv.org/abs/1102.2004
We generalize the level set approach to model epitaxial growth to include thermal detachment of atoms from island edges. This means that islands do not always grow and island dissociation can occur. We make no assumptions about a critical nucleus. Ex
Externí odkaz:
http://arxiv.org/abs/cond-mat/0111258
Autor:
Ratsch, C., Scheffler, M.
Using density-functional theory we compute the energy barriers and attempt frequencies for surface diffusion of Ag on Ag(111) with different lattice constants, and on an Ag adsorbate monolayer on Pt(111). We find that the attempt frequency is of the
Externí odkaz:
http://arxiv.org/abs/cond-mat/9811242
Metallic films are important in catalysis, magneto-optic storage media, and interconnects in microelectronics, and it is crucial to predict and control their morphologies. The evolution of a growing crystal is determined by the behavior of each indiv
Externí odkaz:
http://arxiv.org/abs/cond-mat/9709293
This chapter starts with a summary of the atomistic processes that occur during epitaxy. We then introduce density functional theory (DFT) and describe its implementation into state-of-the-art computations of complex processes in condensed matter phy
Externí odkaz:
http://arxiv.org/abs/cond-mat/9702094
This paper gives a summary of basic concepts of density-functional theory (DFT) and its use in state-of-the-art computations of complex processes in condensed matter physics and materials science. In particular we discuss how microscopic growth param
Externí odkaz:
http://arxiv.org/abs/cond-mat/9702050
Using density-functional theory with the local-density approximation and the generalized gradient approximation we compute the energy barriers for surface diffusion for Ag on Pt(111), Ag on one monolayer of Ag on Pt(111), and Ag on Ag(111). The diffu
Externí odkaz:
http://arxiv.org/abs/cond-mat/9702025
The nucleation and growth of two--dimensional islands is studied with Monte Carlo simulations of a pair--bond solid--on--solid model of epitaxial growth. The conventional description of this problem in terms of a well--defined critical island size fa
Externí odkaz:
http://arxiv.org/abs/cond-mat/9503117
Monte Carlo simulations of an atomistic solid-on-solid model are used to study the effect of lattice misfit on the distribution of two-dimensional islands sizes as a function of coverage $\Theta$ in the submonolayer aggregation regime of epitaxial gr
Externí odkaz:
http://arxiv.org/abs/cond-mat/9406066
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