Yusuf YAKAR
Aksaray University, Faculty of Arts and Science, Department of Physics
Email: yuyakar@yahoo.com
yyakar@aksaray.edu.tr
Phone: +90 382 288 2163
EDUCATION
Ph.D. 2002 Selçuk University (Turkey) Atomic and Molecular Physics
M.Sc.1995 Selçuk University (Turkey) Atomic and Molecular Physics
B.Sc. 1992 Selçuk University (Turkey) Physics
POSITIONS HELD
Professor of Physics (Aksaray University) April 2016
Associate Professor of Physics (Aksaray University) 2011-2016
Assistant Professor of Physics (Aksaray University) 2003-2011
Research Assistant of Physics (Selçuk University) 2000-2003
Research Assistant of Physics (Sakarya University) 1992-2000
PROFESSIONAL DUTIES
Dean of Arts and Science Faculty, 2016-2023
Member, Board of Directors, Aksaray University, 2016- 2023
Member, University Senate, Aksaray University, 2011- 2023
Member, Board of Directors, School of Arts and Sciences, 2011- 2023
Turkish Physical Society Advisory Committee Member, 2018-2020
Manager of Technical Sciences and Vocational Schools, 2016-2016
Vice Dean, School of Arts and Sciences, Aksaray University, 2003-2007 and 2011-2014
Member, Board of Directors, Scientific and Technological Application and Research Center, Aksaray University, 2012-2015
Chairperson, Department of Physics, Aksaray University, 2004 – 2006
Chairperson, Division of Atomic and Molecular Physics Studies, 2003-present
SKILLS AND EXPERTISE
Low-dimensional structures
Computational physics
Mathematical physics
Ab initio calculations
Current Research Interest
My main expertise skills are computational physics, mathematical physics and electronic structure of atoms and molecules. Now, I’m working on electronic structure , optical properties and other perturbation effects of low-dimensional structures such as quantum dots (QDs). Semiconductor materials are extremely important in the development of nanotechnology. Thanks to the remarkable progress in modern technology, it is possible to fabricate ultra-small semiconductor structures such as QDs whose charge carries (electrons and holes) are confined in all the three dimensions. QDs have atomic properties such as discrete energy levels and shell structures, and they are often referred to as artificial atoms. The special confinement causes remarkable changes in the properties of confined systems such as energy spectrum, electrical and optical properties, static polarizability and so on. These structures display an interesting behavior and play an important role in microelectronic and opto-electronic devices since they can affect the electrical, optical and transport properties. QDs have various application fields in the development of microelectronic and opto-electronic devices such as photo infrared detectors, quantum computers, a single electron transistor, quantum lasers and so on.
CITATIONS FROM
sum of the times cited
- 1671- “scholar.google”
- h-index: 23 “scholar.google”
- h-index: 21 “Web of Science”
ARTICLES PUBLISHED IN INTERNATIONAL REFEREED JOURNALS (SCI-Expanded)
40- Y. Yakar, B. Çakır, A. Özmen, Analysis of electronic structure and binding energy in five-electron GaAs/AlxGa1-xAs quantum dots under penetrable confinement potential, Advanced Theory and Simulations (In press 2025).
39- B. Çakır, Y. Yakar, A. Özmen, Investigation of the electronic structure in GaAs/AlxGa1-xAs quantum dots with four electrons, Advanced Theory and Simulations 8 (2025) 2400910.
38- Y. Yakar, B. Çakır, A. Özmen, Optical Properties of Three-Electron GaAs/AlxGa1-xAs QDs with Finite Confinement Potential, Advanced Theory and Simulations 7 (2024) 2400515.
37- C. Demir, B. Çakır, Y. Yakar, A. Özmen, Energies of the Ground and Excited States of Confined Two-Electron Atom in Finite Potential Well. Physica B: Condensed Matter 656 (2023) 414967.
36- Y. Yakar, B. Çakır, C. Demir, A. Özmen, Coulomb, Exchange, Kinetic, Nuclear Attraction and Ionization Energies of Two-Electron Quantum Dot with Finite Confinement Potential. Physics Letters A 466 (2023) 128724.
35- A. Özmen, B. Çakır, C. Demir, Y. Yakar, Investigation of Electronic Structure of a Lithium Atom Confined by a Finite Spherical Cavity. Physica B: Condensed Matter 656 (2023) 414775.
34- C. Demir, Y. Yakar, B. Çakır, A. Özmen, Excited State Energies, Orbital Energies and Virial Coefficients in Confined Multi-Electron Systems. Journal of Luminescence 251 (2022) 119185.
33- Y. Yakar, B. Çakır, C. Demir A. Özmen, Relativistic Effects in Confined Helium-like Atoms. Journal of Luminescence 239 (2021) 118346 .
32- Y. Yakar, B. Çakır, C. Demir, A. Özmen, Energy States, Oscillator Strengths and Polarizabilities of Many Electron Atoms Confined by an Impenetrable Spherical Cavity. International J. Quantum Chemistry 121 (2021) e26658.
31- B. Çakır, Y. Yakar, A. Özmen, Calculation of Electric Field Gradient in Spherical Quantum Dots. Philosophical Magazine 100 (2020) 248.
30- Y. Yakar, B. Çakır, A. Özmen, Polarizability and Electric Field Gradient of Two-Electron Quantum Dot. Journal of Physics and Chemistry of Solids 137 (2020) 109214.
29- Y. Yakar, B. Çakır, A. Özmen, Dipole and Quadrupole Polarizabilities and Oscillator Strengths of Spherical Quantum Dot. Chemical Physics 513 (2018) 213.
28- Y. Yakar, B. Çakır, A. Özmen, Magnetic Field Effects on Oscillator Strength, Dipole Polarizability and Refractive Index Changes in Spherical Quantum Dot. Chemical Physics Letters 708 (2018) 138.
27- B. Çakır, Y. Yakar, A. Özmen, Investigation of Magnetic Field Effects on Binding Energies in Spherical quantum Dot with Finite Confinement Potential. Chemical Physics Letters 684 (2017) 250.
26- B. Çakır, Y. Yakar, A. Özmen, Linear and Nonlinear Absorption Coefficients of Spherical Quantum Dot inside External Magnetic Field. Physica B: Condensed Matter 510 (2017) 86.
25- Y. Yakar, B. Çakır, F. Yılmazer, A. Özmen, Zeeman Transitions in Spherical Quantum Dot. AIP Conference Proceedings 1815 (2017) 030018 .
24- B. Çakır, Ü. Atav, Y. Yakar, A. Özmen, Calculation of Zeeman Splitting and Zeeman Transition Energies of Spherical Quantum Dot in Uniform Magnetic Field. Chemical Physics 475 (2016) 61.
23- B. Çakır, A. Özmen, Y. Yakar, Computation of Hyperfine Energies of Hydrogen, Deuterium and Tritium Quantum Dots. Physica B: Condensed Matter 481 (2016) 32.
22- Y. Yakar, A. Özmen, B. Çakır, Computation of energy states of hydrogenic quantum dot with two-electrons. AIP Conference Proceedings 1722 (2016) 110001.
21- Y. Yakar, B. Çakır, A. Özmen, Calculation of Hyperfine Interaction in Spherical Quantum Dot. Superlattices and Microstructures 86 (2015) 20.
20- Y. Yakar, B. Çakır, A. Özmen, Electronic Structure of Two-Electron Quantum Dot with Parabolic Potential. Philosophical Magazine 95 (2015) 311.
19- Y. Yakar, B. Çakır, A. Özmen, Linear and nonlinear absorption coefficients of spherical two electron quantum dot. Computer Physics Communications 188 (2015) 88.
18- B. Çakır, Y. Yakar, A. Özmen, Linear and Nonlinear Optical Absorption Coefficients of Two-Electron Spherical Quantum Dot with Parabolic Potential. Physica B: Condensed Matter 458 (2015) 138.
17- B. Çakır, Y. Yakar, A. Özmen, Calculation of Oscillator Strength and the Effects of Electric Field on Energy States, Static and Dynamic Polarizabilities of the Confined Hydrogen Atom. Optics Communications 311 (2013) 222.
16- Y. Yakar, B. Çakır, A. Özmen, Off-Center Hydrogenic Impurity in Spherical Quantum Dot with Parabolic Potential. Superlattices and Microstructures 60 (2013) 389.
15- Y. Yakar, B. Çakır, A. Özmen, Electronic structure and relativistic terms of one-electron spherical quantum dot. Journal of Luminescence 137 (2013) 259.
14- Y. Yakar, B. Çakır, A. Özmen, Computation of Relativistic Terms in a Spherical Quantum Dot. Journal of Luminescence 134 (2013) 778.
13- Y. Yakar, B. Çakır, A. Özmen, Refractive index changes and absorption coefficients in a spherical quantum dot with parabolic potential. Journal of Luminescence 132 (2012) 2659.
12- Y. Yakar, B. Çakır, A. Özmen, Computation of Ionization and Various Excited State Energies of Helium and Helium-Like Quantum Dots. International J. Quantum Chemistry 111 (2011) 4139.
11- B. Çakır, Y. Yakar, A. Özmen, Linear and Nonlinear Refractive Index Changes in Spherical Quantum Dot. Progress In Electromagnetic Research M 21 (2011) 77.
10- Y. Yakar, B. Çakır, A. Özmen, Calculation of linear and nonlinear optical absorption coefficients of a spherical quantum dot with parabolic potential. Optics Communications 283 (2010) 1795.
9- B. Çakır, Y. Yakar, A. Özmen, M.Ö. Sezer, M. Şahin, Linear and nonlinear absorption coefficients and binding energy of a spherical quantum dot. Superlattices and Microstructures 47 (2010) 556.
8- Y. Yakar, B. Çakır, A. Özmen, Linear and Nonlinear Optical Properties in Spherical Quantum Dots. Communication in Theoretical Physics 53 (2010) 1185.
7- A. Özmen, Y. Yakar, B. Çakır, Ü. Atav, Computation of the Oscillator Strength and absorption Coefficients for the Intersubband Transitions of the Spherical Quantum Dot. Optics Communications 282 (2009) 3999.
6- B. Çakır, A. Özmen, Ü. Atav, H. Yüksel, Y. Yakar, Calculation of the Electronic Structure of a Spherical Quantum Dot Using a Combination of Quantum Genetic Algorithm and Hartree-Fock Roothaan Method. International J. Modern Physics C 19 (2008) 599.
5- B. Çakır, A. Özmen, Ü. Atav, H. Yüksel, Y. Yakar, Investigation of Electronic Structure of a Quantum Dot Using Slater-Type Orbitals and Quantum Genetic Algorithm. International J. Modern Physics C 18 (2007) 61.
4- Y. Yakar, Evaluation of Orbital- and Ground State Energies of Some Open- and Closed-Shell Atoms over Integer and Noninteger Slater Type Orbitals. Chinese J. Chemistry 25 (2007) 25.
3- Y. Yakar, A. Özmen, B. Çakır, H. Yüksel, Computation of Rotation Matrices Making Lined-up to the Local Cartesian Coordinates. J. The Chinese Chemical Society 54 (2007) 1139.
2- Y. Yakar, A. Özmen, Ü. Atav, Evaluation of Two-Center One- and Two-Electron Integrals over Slater Type Orbitals. Chinese J. Chemistry 24 (2006) 603.
1- A. Özmen, A. Karakaş, Ü. Atav, Y. Yakar, Computation of Two-Center Coulomb Integrals over Slater-Type Orbitals using Elliptical Coordinates. International J. Quantum Chemistry 91 (2003) 13.
ARTICLES PUBLISHED IN INTERNATIONAL REFEREED JOURNALS
3- Y. Yakar, B. Çakır, A. Özmen, Ground Sate and Relativistic Energies of Open-and Closed-Shell Atoms (Z=2-38) Over Integer and Noninteger n-Slater Type Orbitals. Far East Journal of Electronic and Communications 6 (2011) 113.
2- Y. Yakar, B. Çakır, A. Özmen, Ground and Excited State Energies of a Hydrogenic Impurity over Exponential Type Orbitals. Azerbaijan Journal of Physics, 16, 231-233 (2010).
1- B. Çakır, Y. Yakar, A. Özmen, Energy States of a Spherical Quantum Dot over Slater Type Orbitals. Azerbaijan Journal of Physics, 16, 234-236 (2010).
INTERNATIONAL CONFERENCE PRESENTATIONS
15- Y. Yakar, A. Özmen, B. Çakır, Inonization Energy of Two-Electron Quantum Dots with Parabolic Potential, International Congress on the World of Technology and Advanced Materials (WITAM-2018) 21-23 September , pp 265-267, 2018 Kırşehir/Turkey.
14- Y. Yakar, A. Özmen, B. Çakır, Various Excited Energy States of Two-Electron Quantum Dot, International Congress on the World of Technology and Advanced Materials (WITAM-2018) 21-23 September, pp 262-264, 2018 Kırşehir/Turkey.
13- Y. Yakar, A. Özmen, B. Çakır, Perturbation Calculation of off-Center Hydrogenic Donor, Turkish Physical Society 33th International Physics Congress, September 6-10, pp-257, 2017 /Bodrum-Turkey.
12- Y. Yakar, A. Özmen, B. Çakır, Dipole Polarizabilities of Hydrogenic Impurity, Turkish Physical Society 33th International Physics Congress, September 6-10, pp-231, 2017 /Bodrum-Turkey.
11- B. Çakır, Y. Yakar, S.S. Doğan, A. Özmen, Binding Eenergies of Many Electron Quantum Dots, Turkish Physical Society 33th International Physics Congress, September 6-10, pp-415, 2017 /Bodrum-Turkey.
10- B. Çakır, Y. Yakar, A. Türker, A. Özmen, Electric Field Effect on Spherical Quantum Dot, Turkish Physical Society 33th International Physics Congress, September 6-10, pp-419, 2017 /Bodrum-Turkey.
9- Y. Yakar, B. Çakır, A. Özmen, Dipole Polarization of Hydrogenic Impurity, International Conferance, 18-20 May 2017, Kaunas/Lithuania
8- Y. Yakar, B. Çakır, A. Özmen, Energy States and Binding Energies of Hydrogenic Impurity, International Conferance, 18-20 May 2017, Kaunas/Lithuania
7- Y. Yakar, B. Çakır, F. Yılmazer, A. Özmen, Zeeman Transition Energies in Spherical Quantum Dot, Turkish Physical Society 32th International Physics Congress, September 6-9, 2016 /Bodrum-Turkey.
6- Y. Yakar, A. Özmen, B. Çakır, Computation of Energy States of Hydrogenic Quantum Dot with Two-Electron, 9th International Physics Conference of the Balkan Physical Union- BPU-9, 24 – 27 August , 2015 , İstanbul University, İstanbul/Turkey.
5- Y. Yakar, B. Çakır, A. Özmen, Evaluation of Overlap Integrals in Molecular Coordinate System with Slater-Type Orbitals, 3rd International Eurasian Conference on Mathematical Sciences and Applications, 2014, August 25-28, Vienna, Austria.
4- Y. Yakar, B. Çakır, A. Özmen, Computation of Energies of Atoms over Integer and Noninteger Quantum Numense, 1st International Eurasian Conference on Mathematical Sciences and Applications, 2012, September 03-07, Prishtine Kosova.
3- Y. Yakar, B. Çakır, A. Özmen, Ground and Excited State Energies of a Hydrogenic Impurity over Exponential Type Orbitals. International PHYSICS-2010 Conference, 2010, 30 June- 2, Baku, Azerbaijan.
2- B. Çakır, Y. Yakar, A. Özmen, Energy States of a Spherical Quantum Dot over Slater Type Orbitals. International PHYSICS-2010 Conference, 2010, 30 June- 2, Baku, Azerbaijan.
1- B. Çakır, A. Özmen, M. Şahin, Y. Yakar, Ü. ATV, H. Yüksel, Determination of Wave Function of a Quantum Dot Using the Genetic Algorithm. Proceedings of the International Conference on Modelling and Simulation. 2006, 28–30 August 2006, Konya, TURKEY, Paper No B032.
ARTICLES PUBLISHED IN NATIONAL REFEREED JOURNALS
12- F. Yılmazer, Y. Yakar, B. Çakır, A. Özmen, Electronic Structure and Binding Energy of Spherical Quantum Dot, ASUJSE Journal of Science and Engineering, 1, (2017) 41.
11- A. Türker, B. Çakır, A. Özmen, Y. Yakar, Investigation of Electric Field Effect in Two-Electron Quantum Dots by Perturbation Method, S.Ü. Fen-Edebiyat Fakültesi Fen Dergisi 42 (2016) 64.
10- E. Ş. Doğan, B. Çakır, A. Özmen, Y. Yakar, Investigation of Electric Field Effect in Quantum Dots by Perturbation Method, S.Ü. Fen-Edebiyat Fakültesi Fen Dergisi 41 (2015) 124.
9- B. Çakır, M.Ö. Sezer, Y. Yakar, A. Özmen, H. Yüksel, Investigation of the Ground State of Hydrogenic Quantum Dot by Quantum Genetic Algorithm, S.Ü. Fen-Edebiyat Fakültesi Fen Dergisi 2 (2009) 45.
8- Y. Yakar, M.Ö. Sezer, B. Çakır, H. Yüksel, Calculation of Two-Center One Electron Integrals. Physics, Engineering Physics, Electronic Engineering and Astronomy 49 (2005) 1.
7- B. Çakır, E. Akın, Y. Yakar, M. Karabıyık, A. Güleç, H. Yüksel, Investigation of 1, 4 Benzoconine, 2-Methyl-1, 4-Benzoconine and Tetramethyl-1, 4-Benzoconine Molecules by Electronic Spectroscopy, S.Ü. Fen-Edebiyat Fakültesi Fen Dergisi 24 (2004) 1.
6- Y. Yakar, A. Özmen, Calculation of Hyperfine Coupling Constants in First Order Atoms Using Binomial Coefficients, S.Ü. Fen-Edebiyat Fakültesi Fen Dergisi 19 (2002) 113.
5- Y. Yakar, M.Ö. Sezer, Computation of One-Center Overlap, Nuclear Attraction and Kinetic Energy Integrals ov er Nonintegral-n Slater-Type Orbitals, Physics, Engineering Physics, Electronic Engineering and Astronomy 46 (2001) 41.
4- A. Özmen, Y. Yakar, M.Ö. Sezer, Ü. Atak, Yüksel H, Calculation of One-Centre Overlap, Potential and Kinetic Energy Integrals over Slater-Type Orbitals Using Binomial Coefficients, S.Ü. Fen-Edebiyat Fakültesi Fen Dergisi 18 (2001) 67.
3- B. Çakır, A. Özmen, Y. Yakar, M.Ö. Sezer, Yüksel H, Investigation of Phenol, p-Bromphenol and p-Nitrophenol Molecules by Molecular Electronic Spectroscopy, S.Ü. Fen-Edebiyat Fakültesi Fen Dergisi 18 (2001) 73.
2- M.Ö. Sezer, A. Özmen, M. Kumru, Y. Yakar, H. Yüksel, Electronic Absorption Spectroscopy of Toluidine Molecules, S.Ü. Fen-Edebiyat Fakültesi Fen Dergisi 1 (2000) 51.
1- Y. Yakar, H. Yüksel, M. Kumru, A. Özmen, Electronic Absorption Spectroscopy of Benzene, Aniline and Pyridine Molecules, S.Ü. Fen-Edebiyat Fakültesi Fen Dergisi 15 (1998) 47.
COURSES TAUGHT
Quantum Physics (undergraduate), 2010-present
Atomic and Molecular Physics (undergraduate), 2010-present
Electrics and Magnetism (undergraduate), 2008-present
Computing for Physics (graduate), 2012-present
Advanced Molecular and Atomic Physics (graduate), 2011-present
Theory of Electronic Structure of Atoms and Molecules (graduate), 2011-present