نتایج جستجو برای: شاخص mbe

تعداد نتایج: 76393  

Journal: :Nanoscale 2015
J A Steele J Horvat R A Lewis M Henini D Fan Yu I Mazur V G Dorogan P C Grant S-Q Yu G J Salamo

In this study we report in-plane nanotracks produced by molecular-beam-epitaxy (MBE) exhibiting lateral self-assembly and unusual periodic and out-of-phase height variations across their growth axes. The nanotracks are synthesized using bismuth segregation on the GaAsBi epitaxial surface, which results in metallic liquid droplets capable of catalyzing GaAsBi nanotrack growth via the vapor-liqui...

Journal: :Journal of Physics D: Applied Physics 2011

2012
Tomoya Horiguchi Tsukasa Hirashima Kenneth D. Forbus

An important purpose of science education is to help students acquire the ability to build appropriate model of systems. For facilitating such learning activity, modelbuilding learning environments (MBE) have been developed. Recent MBEs assist students in building conceptual models of systems and simulating their qualitative behavior. However, their feedback is insufficient when an erroneous mo...

2016
Charles J. Reyner Arnold M. Kiefer Gamini Ariyawansa Joshua M. Duran John E. Scheihing Paul J. Simmonds

Strained-layer superlattices (SLSs) are an active research topic in the molecular beam epitaxy (MBE) and infrared focal plane array communities. These structures undergo a >500 K temperature change between deposition and operation. As a result, the lattice constants of the substrate and superlattice are expected to change by approximately 0.3%, and at approximately the same rate. However, we pr...

2001
K. A. Ritley B. Krause F. Schreiber H. Dosch

A portable UHV molecular beam deposition system has been developed for synthesis, in situ, and real-time x-ray diffraction measurements of organic thin films, multilayers, and superlattices. The system has been optimized for small size, while still incorporating full features necessary to achieve thin film growth under molecular beam epitaxy ~MBE! conditions. It can be used independently for th...

Journal: :SIAM J. Scientific Computing 2011
Zhonghua Qiao Zhengru Zhang Tao Tang

This paper is concerned with the numerical simulations for the dynamics of the molecular beam epitaxy (MBE) model. The numerical simulations of the MBE models require long time computations, and therefore large time-stepping methods become necessary. In this work, we consider some unconditionally energy stable finite difference schemes, which will be used in the time adaptivity strategies. It i...

Journal: :Microelectronics Journal 2005
M. L. Crespillo J. L. Sacedón B. A. Joyce P. Tejedor

Self-organized growth of GaAs on (110) substrates vicinal to (111)A by hydrogen-assisted molecular beam epitaxy (H-MBE) has been studied for different kinetic regimes using atomic force microscopy (AFM). When GaAs growth is limited by kinetics of adatom incorporation to steps, the presence of chemisorbed H on the surface after oxide removal promotes the incorporation of adatoms to steps from th...

2000
R. Viturro S. Chang L. Shaw C. Mailhiot L. Brillson A. Terrasi Y. Hwu G. Margaritondo

We report soft x-ray photoemission studies of metal/molecular-beam epitaxy (MBE)GaAs(lOO) interfaces formed at low temperature. Our results indicate that rectifying barrier heights are proportional to the metal work function in accordance with Schottky's original description of metal-semiconductor contacts. These results confirm the predictions of a selfconsistent model of metal-semiconductor i...

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