Showing 21 - 30 of 58
Persistent link: https://www.econbiz.de/10009281809
In this paper, we present a theoretical study of the quantized electronic states in Cd<Subscript>1-x</Subscript>Zn<Subscript>x</Subscript>S quantum dots. The shape of the confining potential, the subband energies and their eigen envelope wave functions are calculated by solving a one-dimensional Schrödinger equation. Electrons and holes...</subscript></subscript>
Persistent link: https://www.econbiz.de/10009281847
The energy spectra of H<Subscript>2</Subscript> <Superscript>+</Superscript>-like impurities confined in finite spherical quantum dots have been calculated as a function of the distance between nuclear with different sizes on the basis of effective-mass approximation by linear variational method. B-splines have been used as basis functions,...</superscript></subscript>
Persistent link: https://www.econbiz.de/10009281981
We present a study of the primary optical transitions and recombination dynamics in InGaAs self-assembled quantum nanostructures with different shape. Starting from the same quantum dot seeding layer, and depending on the overgrowth conditions, these new nanostructures can be tailored in shape...
Persistent link: https://www.econbiz.de/10009282093
We consider a two-terminal Aharonov-Bohm (AB) interferometer with a quantum dot inserted in one path of the AB ring. We investigate the transport properties of this system in and out of the Kondo regime. We utilize perturbation theory to calculate the electron self-energy of the quantum dot with...
Persistent link: https://www.econbiz.de/10009282144
A microscopic theory is used to study photoluminescence of semiconductor quantum dots under the influence of Coulomb and carrier-photon correlation effects beyond the Hartree-Fock level. We investigate the emission spectrum and the decay properties of the time-resolved luminescence from...
Persistent link: https://www.econbiz.de/10009282212
We consider solutions of the 2×2 matrix Hamiltonian of physical systems within the context of the asymptotic iteration method. Our technique is based on transformation of the associated Hamiltonian in the form of the first order coupled differential equations. We construct a general matrix...
Persistent link: https://www.econbiz.de/10009282482
A variational formalism for the calculation of the binding energies of hydrogenic donors in a parabolic diluted magnetic semiconductor quantum dot is discussed. Results are obtained for Cd<InlineEquation ID="Equ1"> <EquationSource Format="TEX">$_{1-x_{in}}$</EquationSource> </InlineEquation>Mn<InlineEquation ID="Equ2"> <EquationSource Format="TEX">$_{x_{in}}$</EquationSource> </InlineEquation>Te/Cd<InlineEquation ID="Equ3"> <EquationSource Format="TEX">$_{1-x_{out}}$</EquationSource> </InlineEquation>Mn<InlineEquation ID="Equ4"> <EquationSource Format="TEX">$_{x_{out}}$</EquationSource> </InlineEquation>Te structures as a function of the dot...</equationsource></inlineequation></equationsource></inlineequation></equationsource></inlineequation></equationsource></inlineequation>
Persistent link: https://www.econbiz.de/10009282491
We study the energy levels of non-interacting electrons confined to move in two-dimensional billiard regions and having a spin-dependent dynamics due to a finite Rashba spin splitting. The free space Green's function for such Rashba billiards is constructed analytically and used to find the area...
Persistent link: https://www.econbiz.de/10009282769
We consider a nano-system connected to measurement probes via non interacting leads. When the electrons interact inside the nano-system, the coefficient |t<Subscript>s</Subscript>(E<Subscript>F</Subscript>)|<Superscript>2</Supe rscript> describing its effective transmission at the Fermi energy E<Subscript>F</Subscript> ceases to be local. This effect of electron-electron interactions upon...</subscript><//supe></superscript></subscript></subscript>
Persistent link: https://www.econbiz.de/10009279993