Damping of Growth Oscillations in Molecular Beam Epitaxy: A Renormalization Group Approach
نویسندگان
چکیده
The conserved Sine-Gordon equation with nonconserved shot noise is used to model homoepitaxial crystal growth. With increasing coverage the renormalized pinning
منابع مشابه
In-situ Determination of Indium Segregation in InGaAs/GaAs Quantum Wells Grown by Molecular Beam Epitaxy
The surface segregation of indium atoms during the growth of InGaAs/GaAs heterostructures has been investigated in situ by re ection high-energy electron di raction (RHEED). We pointed out that the strong damping of the RHEED oscillations during the deposition of InGaAs on GaAs was related to the segregation strength of indium atoms in the InGaAs layer. A simple model shows that the decay const...
متن کاملGrowth study of chemical beam epitaxy of GaN , P , _ - x using NH 3 and tertiarybutylphosphine
A study in the growth of GaN,P, _s epilayers by chemical beam epitaxy using tertiarybutylphosphine (TBP), ammonia (NH3), and elemental Ga or triethylgallium is reported. Monitoring reflection high-energy/ electron diffraction (RHEED) intensity oscillations, we observe that both group-IIIand group-V-induced incorporation rates are increased when NH3 is introduced into a single cracker with TBP. ...
متن کاملReflection High - Energy Electron Diffraction oscillations during epitaxial growth of artificially layered films of ( BaCuO x ) m / ( CaCuO
Pulsed Laser Deposition in molecular-beam epitaxy environment (Laser-MBE) has been used to grow high quality BaCuO x /CaCuO 2 superlattices. In situ Reflection High Energy Electron Diffraction (RHEED) shows that the growth mechanism is 2-dimensional. Furthermore, weak but reproducible RHEED intensity oscillations have been monitored during the growth. Ex-situ x-ray diffraction spectra confirmed...
متن کاملA numerical renormalization group approach for calculating the spectrum of a vibronic system occurring in molecules or impurities in insulators
Theoretically, in order to describe the behavior of a spectrum, a mathematical model whichcould predict the spectrum characteristics is needed. Since in this study a Two-state system has beenused like models which was introduced previously past and could couple with the environment, theformer ideas have been extended in this study. we use the second quantized version for writing thisHamiltonian...
متن کاملLow-damping sub-10-nm thin films of lutetium iron garnet grown by molecular-beam epitaxy
We analyze the structural and magnetic characteristics of (111)-oriented lutetium iron garnet (Lu3Fe5O12) films grown by molecular-beam epitaxy, for films as thin as 2.8 nm. Thicknessdependent measurements of the inand out-of-plane ferromagnetic resonance allow us to quantify the effects of two-magnon scattering, along with the surface anisotropy and the saturation magnetization. We achieve eff...
متن کامل