Threshold frequency of absorption

A Quantum Pseudodot System with Two-Dimensional Pseudoharmonic Oscillator In External Magnetic and Aharonov-Bohm Fields

Tue, 2013-10-29 14:20 — Sameer. Ikhdair

Journal Title, Volume, Page:

Physica B: Condensed Matter Volume 407, Issue 21, 4198–4207

Year of Publication:

2012

Link:

http://www.sciencedirect.com/science/article/pii/S092145261200676X

Authors:

Sameer M. Ikhdair

Physics Department, Near East University, 922022 Nicosia, North Cyprus, Turkey

Current Affiliation:

Department of Physics, Faculty of Science, An-Najah National University, Nablus, Palestine

[email protected]

Majid Hamzavi

Department of Basic Sciences, Shahrood Branch, Islamic Azad University, Shahrood, Iran

Preferred Abstract (Original):

Using the Nikiforov–Uvarov (NU) method, the energy levels and the wave functions of an electron confined in a two-dimensional (2D) pseudoharmonic quantum dot are calculated under the influence of temperature and an external magnetic field inside dot and Aharonov–Bohm (AB) field inside a pseudodot. The exact solutions for energy eigenvalues and wave functions are computed as functions of the chemical potential parameters, applied magnetic field strength, AB flux field, magnetic quantum number and temperature. Analytical expression for the light interband absorption coefficient and absorption threshold frequency are found as functions of applied magnetic field and geometrical size of quantum pseudodot. The temperature dependence energy levels for GaAs semiconductor are also calculated.

Spectra of Cylindrical Quantum Dots: The Effect of Electrical and Magnetic ﬁelds Together with AB ﬂux ﬁeld

Sun, 2013-09-15 09:32 — Sameer. Ikhdair

Journal Title, Volume, Page:

Physica B: Condensed Matter Volume 407, Issue 23, 1, Pages 4523–4529

Year of Publication:

2012

Link:

http://www.sciencedirect.com/science/article/pii/S0921452612007776?np=y

Authors:

Sameer M. Ikhdair

Physics Department, Near East University, 922022, Nicosia, North Cyprus, Mersin 10, Turkey

Current Affiliation:

Department of Physics, Faculty of Science, An-Najah National University, Nablus, Palestine

[email protected]

Majid Hamzavi

Department of Basic Sciences, Shahrood Branch, Islamic Azad University, Shahrood, Iran

Ramazan Sever

Physics Department, Middle East Technical University, 06531 Ankara, Turkey

Preferred Abstract (Original):

We study the spectral properties of electron quantum dots (QDs) confined in 2D parabolic harmonic oscillator influenced by external uniform electrical and magnetic fields together with an Aharonov–Bohm (AB) flux field. We use the Nikiforov–Uvarov method in our calculations. Exact solutions for the energy levels and normalized wave functions are obtained for this exactly soluble quantum system. Based on the computed one-particle energetic spectrum and wave functions, the interband optical absorption GaAs spherical shape parabolic QDs is studied theoretically and the total optical absorption coefficient is calculated.

An-Najah Staff