The self-consistent calculation of a spherical quantum dot: A quantum genetic algorithm study

Date

2005-08-01

Author

Sahin, M
Tomak, Mehmet

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

154
views

0
downloads

In this study, we have calculated the subband energy level, potential profile, and the corresponding wavefunction and chemical potential for different temperatures and donor concentrations in a spherical quantum dot self-consistently. We have also investigated the effect of exchange-correlation potential on the energy levels. In addition, we have checked the applicability of quantum genetic algorithm to a realistic self-consistent quantum dot problem. In all computations, the penetration of wavefunction to the barrier region is taken into account.

Subject Keywords

Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Condensed Matter Physics

URI

https://hdl.handle.net/11511/38898

Journal

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES

DOI

https://doi.org/10.1016/j.physe.2005.03.010

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

A theoretical study of chemical doping and width effect on zigzag graphene nanoribbons Pekoz, Rengin; Erkoç, Şakir (Elsevier BV, 2009-12-01) The energetics and the electronic properties of nitrogen- and boron-doped graphene nanoribbons with zigzag edges have been investigated using density functional theory calculations. For the optimized geometry configurations, vibrational frequency analysis and wavefunction stability tests have been carried out. Different doping site optimizations for a model nanoribbon have been performed and formation energy values of these sites revealed that zigzag edgesite for both of the dopants were the most favorable ...
Does tubular structure of carbon form only from graphine sheet? Erkoç, Şakir (Elsevier BV, 2004-10-01) The structural and electronic properties of carbon nanotubes constructed from non-graphine sheet have been investigated qualitatively by performing semi-empirical self-consistent-field molecular orbital calculations at the level of AMI method within the RHF formulation. It has been found that these structures are stable and endothermic. From the point of view of electronic properties these structures seem to be nonconductive; their frontier molecular orbital energy differences are large, in the order of 10e...
THE NONLINEAR COLD PLASMA-BUNCHED BEAM INTERACTION AND THE PLASMA WAKEFIELD ACCELERATOR CASE BILIKMEN, S; NAZIH, RM (IOP Publishing, 1993-02-01) In this paper, a nonlinear analytical solution for a cold plasma-bunched beam system based on the Hamiltonian formalism where alpha = n(b)/n0 and beta(phi) = upsilon(phi)/c have been taken as parameters matching between zero and unity is given. The oscillation limiting energies, frequencies and transformer ratios have been carried out in general for both the one-dimensional and the case where a small transverse component of motion is included. The plasma wakefield accelerator has been treated as a special c...
A parabolic quantum dot with N electrons and an impurity Gulveren, B; Atav, U; Sahin, M; Tomak, Mehmet (Elsevier BV, 2005-12-01) Ground-state properties of a two-dimensional quantum dot composed of N electrons and an impurity are investigated by the Thomas-Fermi (TF) method at T = 0. The changes induced by the impurity in electron density, chemical potential and total energy are calculated. Calculations are also performed for different number of particles and strength of confinement. The results indicate that Thomas-Fermi approximation is applicable even when the system contains only a few particles.
PL and XPS depth profiling of Si/Al2O3 co-sputtered films and evidence of the formation of silicon nanocrystals Dogan, I.; Yıldız, İlker; Turan, Raşit (Elsevier BV, 2009-05-08) We have studied the correlation between light emission and structural properties of silicon nanocrystals formed in Al2O3 matrix by co-sputtering followed by an annealing in the temperature range of 900-1100 degrees C. X-ray diffraction (XRD) experiments revealed the nanocrystal formation which is a function of Si sputtering power and annealing temperature. The chemical structure and atomic compositions of Si, Al, O and their variations with depth from the sample surface have been investigated by X-ray photo...

Citation Formats

M. Sahin and M. Tomak, “The self-consistent calculation of a spherical quantum dot: A quantum genetic algorithm study,” PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, pp. 247–256, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38898.