Miniband landscape of disordered dimer superlattices
نویسندگان
چکیده
منابع مشابه
Miniband transport and oscillations in semiconductor superlattices
We present and analyse solutions of a recent derivation of a drift-diffusion model of miniband transport in strongly coupled superlattices. The model is obtained from a single-miniband Boltzmann–Poisson transport equation with a BGK (Bhatnagar–Gross–Krook) collision term by means of a consistent Chapman–Enskog expansion. The reduced drift-diffusion equation is solved numerically and travelling ...
متن کاملMaximum Entropy Closure of Balance Equations for Miniband Semiconductor Superlattices
Charge transport in nanosized electronic systems is described by semiclassical or quantum kinetic equations that are often costly to solve numerically and difficult to reduce systematically to macroscopic balance equations for densities, currents, temperatures and other moments of macroscopic variables. The maximum entropy principle can be used to close the system of equations for the moments b...
متن کاملLuminescence from Miniband States in Heavily Doped Superlattices
We have studied doped superlattices of GaAs/AlGaAs composition. When the doping atoms are introduced into the barriers surrounding the superlattice, as well as to the inner ones, but with half of the concentration, the photoluminescence due to interband transitions from extended superlattice states is detected. This is demonstrated by a study of the sample’s photoluminescence in a magnetic fiel...
متن کاملTheory of transmission through disordered superlattices
We derive a theory for transmission through disordered finite superlattices in which the interface roughness scattering is treated by disorder averaging. This procedure permits efficient calculation of the transmission through samples with large cross-sections. These calculations can be performed utilizing either the Keldysh or the Landauer-Büttiker transmission formalisms, both of which yield ...
متن کاملSpectroscopic ellipsometry of intentionally disordered superlattices
We characterized the electronic properties of ordered and intentionally disordered GaAs–AlxGa12xAs superlattices, with and without dimer-type correlations in the disorder, by means of spectroscopic ellipsometry in the near band-edge region. The spectra have been compared to the calculate electronic structure. The optical transitions in the various superlattices show specific features related to...
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: Physica D: Nonlinear Phenomena
سال: 1997
ISSN: 0167-2789
DOI: 10.1016/s0167-2789(97)00082-1