Browsing by Author "Çakır, Bekir"
Now showing items 1-20 of 36
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Calculation of electric field gradient in spherical quantum dots
Çakır, Bekir; Yakar, Yusuf; Özmen, Ayhan (Taylor & Francis, 2020)We have calculated the ground and excited energy states of the quantum dot as a function of the depth of confining potential well and radius R. Based on the calculated energies and wave functions, the electric field gradient ... -
Calculation of electronic structure of a spherical quantum dot using a combination of quantum genetic algorithm and Hartree-Fock-Roothaan method
Çakır, Bekir; Özmen, Ayhan; Atav, Ülfet; Yüksel, Hüseyin; Yakar, Yusuf (World Scientific Publ Co Pte Ltd, 5 Toh Tuck Link, Singapore, 2008)The electronic structure of Quantum Dot (QD), GaAs/AlxGa1-xAs, has been investigated by using a combination of Quantum Genetic Algorithm (QGA) and Hartree-Fock-Roothaan (HFR) method. One-electron system with an on-center ... -
Calculation of hyperfine interaction in spherical quantum dot
Yakar, Yusuf; Çakır, Bekir; Özmen, Ayhan (Academic Press, 2015)In this study, we have calculated the unperturbed wavefunctions and energy eigenvalues of the ground and excited states of a spherical quantum dot, GaAs/AlxGa1-xAs, by using quantum genetic algorithm and Hartree-Fock ... -
Calculation of linear and nonlinear optical absorption coefficients of a spherical quantum dot with parabolic potential
Yakar, Yusuf; Çakır, Bekir; Özmen, Ayhan (Elsevier Science Bv, 2010)In the effective mass approximation, we calculated the binding energy and wave function for the 1s-, 1p-, 1d- and 1f-states of a spherical quantum dot (QD) with parabolic potential by using a combination of quantum genetic ... -
Calculation of oscillator strength and the effects of electric field on energy states, static and dynamic polarizabilities of the confined hydrogen atom
Çakır, Bekir; Yakar, Yusuf; Özmen, Ayhan (2013)In this study, we investigate the effect of an electric field on energy states of a spherical quantum dot with infinite confining potential using the perturbation method. We also perform the static dipole and dynamic dipole ... -
Calculation of Zeeman splitting and Zeeman transition energies of spherical quantum dot in uniform magnetic field
Çakır, Bekir; Atav, Ülfet; Yakar, Yusuf; Özmen, Ayhan (Elsevier Science Bv, 2016)In this study we report a detailed theoretical investigation of the effect of an external magnetic field on the 1s-, 2p-, 3d- and 4f-energy states of a spherical quantum dot. We treat the contribution of the diamagnetic ... -
Computation of hyperfine energies of hydrogen, deuterium and tritium quantum dots
Çakır, Bekir; Özmen, Ayhan; Yakar, Yusuf (Elsevier Science, 2016)The hyperfine energies and hyperfine constants of the ground and excited states of hydrogen, deuterium and tritium quantum dots(QDs) are calculated. Quantum genetic algorithm (QGA) and Hartree-Fock-Roothaan (HFR) methods ... -
Computation of ionization and various excited state energies ofhelium and helium-like quantum dots
Yakar, Yusuf; Çakır, Bekir; Özmen, Ayhan (Wiley-Blackwell, 2011)In the effective mass approximation, we calculated the wave functions and some energy states of helium and helium-like quantum dots (QDs) with impurity charges Z = 0, 1, 2, 3, and 4. In addition, we carried out the ionization ... -
Computation of relativistic terms in a spherical quantum dot
Yakar, Yusuf; Çakır, Bekir; Özmen, Ayhan (Elsevier Science, 2013)We studied a hydrogenic impurity located at the center of a spherical quantum dot with an infinite spherical confining potential and calculated energy levels and wavefunctions using Quantum Genetic Algorithm(QGA) and ... -
Computation of rotation matrices making lined‐up to the local cartesian coordinates
Yakar, Yusuf; Özmen, Ayhan; Çakır, Bekir; Yüksel, Hüseyin (Wiley Online Lİbrary, 2007)Rotation matrices were expressed in terms of Gaunt coefficients and complex spherical harmonics. The rotation matrices were calculated using two different ways. In the first, Gaunt coefficients and normalized complex ... -
Computation of the oscillator strength and absorption coefficients for the intersubband transitions of the spherical quantum dot
Özmen, Ayhan; Yakar, Yusuf; Çakır, Bekir; Atav, Ülfet (Elsevier Science, 2009)The electronic structure and optical properties of one-electron Quantum Dot (QD) with and without an on-center impurity were investigated by assuming a spherically symmetric confining potential of finite depth. The energy ... -
Coulomb, exchange, kinetic, nuclear attraction and ionization energies of two-electron quantum dot with finite confinement potential
Yakar, Yusuf; Çakır, Bekir; Demir, Celalettin; Özmen, Ayhan (Elsevier B.V., 2023)We have calculated Coulomb, exchange and configuration-average ionization energies for the ground and excited configurations in helium atom confined by a spherical cavity of finite barrier height. In addition, we have ... -
The diurnal change of thyroid-stimulating hormone and the effect of this change on thyroid functions in patients with chronic kidney disease
Soylu, Hüseyin; Ersoy, Reyhan; Keske, Pelin Bal; Tunçay, Merve Ergin; Ateş, Can; Çakır, Bekir; Yalçın, Bülent (Springer, 2023)Thyroid-stimulating hormone (TSH) has a pulsatile and circadian rhythm in healthy individuals. We aimed to evaluate the diurnal changes of free thyroid hormones and serum TSH levels in patients with end-stage renal failure ... -
Electronic structure and binding energy of spherical quantum dot
Yılmazer, Fatma; Yakar, Yusuf; Çakır, Bekir; Özmen, Ayhan (Aksaray Üniversitesi, 2017)In this study, we have calculated the energy states and the wavefunctions of the spherical quantum dot with finite and infinite confining potential. In addition, we have investigated the binding energies of the ground ... -
Electronic structure and relativistic terms of one-electron spherical quantum dot
Özmen, Ayhan; Çakır, Bekir; Yakar, Yusuf (Elsevier, 2013)We calculated the energy eigenvalues and eigenfunctions of the ground and excited states of a hydrogenic impurity located at the center of a spherical quantum dot using the Quantum Genetic Algorithm (QGA) and Hartree-Fock ... -
Electronic structure of two-electron quantum dot with parabolic potential
Yakar, Yusuf; Çakır, Bekir; Özmen, Ayhan (Taylor & Francis Ltd, 2015)In this study, we investigate the parabolic potential effects on the ground and excited energy states of two-electron quantum dot with impurity inside an infinite spherical confining potential well. The wave function and ... -
Energies of the ground and excited states of confined two-electron atom in finite potential well
Demir, Celalettin; Çakır, Bekir; Yakar, Yusuf; Özmen, Ayhan (Elsevier B.V., 2023)For the ground and excited configurations, we have carried out the energy eigenvalues and corresponding wavefunctions of two-electron atom enclosed by finite confining potential by using Quantum Genetic Algorithm (QGA) ... -
Energy states, oscillator strengths and polarizabilities of many electron atoms confined by an impenetrable spherical cavity
Yakar, Yusuf; Çakır, Bekir; Demir, Celalettin; Özmen, Ayhan (Wiley, 2021)We have calculated the ground and excited state energies and the orbital energies of three-electron atoms inside impenetrable spherical cavity. Energy eigenvalues and wavefunctions are calculated from the variational ... -
Excited state energies, orbital energies and virial coefficients in Confined multi-electron systems
Demir, Celalettin; Yakar, Yusuf; Çakır, Bekir; Özmen, Ayhan (Elsevier B.V., 2022)In the present study, the electronic structure of neutral He and Li atoms confined at the center of an impenetrable spherical cavity of varying radius has been investigated. Average, state, orbital energies and wave functions ... -
Investigation of electronic structure of a lithium atom confined by a finite spherical cavity
Özmen, Ayhan; Çakır, Bekir; Demir, Celalettin; Yakar, Yusuf (Elsevier B.V., 2023)In this study, we have calculated the average energies of the ground and excited configurations of a lithium atom enclosed by a spherical potential well with finite barrier height, and we have also carried out calculations ...
