THE GROUND-STATE DESCRIPTION OF THE OPTICAL POLARON VERSUS THE EFFECTIVE DIMENSIONALITY IN QUANTUM-WELL-TYPE SYSTEMS

1991-03-11
Within the framework of the strong-coupling polaron theory the ground-state binding energy and the effective mass of the electron-LO phonon system is retrieved as a function of the effective dimensionality in a quantum-well confinement. The geometry we use is a three-dimensional parabolic potential box, the barrier slopes of which can be tuned so as to yield a unified characterization interpolating between the bulk, the quasi-two- and one-dimensional limits as well as the quantum-well box case.
JOURNAL OF PHYSICS-CONDENSED MATTER

Suggestions

WEAK-COUPLING OPTICAL POLARON IN QW-CONFINED MEDIA
YILDIRIM, T; Erçelebi, Ayşe Çiğdem (IOP Publishing, 1991-06-17)
The ground state of the Frohlich polaron is retrieved as a function of the degree of confinement in a three-dimensional quantum well with tunable barrier potentials. A unified overview of the binding energy interpolating between all possible confinement geometries is provided within the framework of the second-order perturbation theory.
THE TWO-DIMENSIONAL MAGNETO-POLARON IN THE STRONG-COUPLING REGIME
Erçelebi, Ayşe Çiğdem (IOP Publishing, 1989-04-03)
Within the framework of the strong-coupling polaron theory the problem of a two-dimensional electron coupled to LO phonons under an external magnetic field is studied. When a suitably modified coherent phonon state interrelating the magnetic field and the polaron counterparts of the problem is adopted, it is seen that the theory reproduces the desirable asymptotic limits attained by the perturbation or the usual adiabatic theories. Moreover, the theory indicates that an abrupt 'stripping transition' in the ...
The electronic structure of a quantum well under an applied electric field
Sari, H; Ergun, Y; Sokmen, I; Tomak, Mehmet (Elsevier BV, 1996-01-01)
The effects of an applied electric field on quantum well subband energies are calculated variationally within the effective mass approximation for model potential profiles. The concept of a quasi-bound state is examined critically. For higher electric field values it is shown that the quasi-bound state approximation for the ground and first excited state of the electron, and for the ground state of the hole is valid. (C) 1996 Academic Press Limited
The Nonlinear Theory of the Snoek Relaxation Effect under the Strong and Homogeneous Bias Stress System
Ogurtani, Tarik Ömer (Wiley, 1987-11-1)
The nonlinear theory of energy dissipation associated with the mobile paraelastic octahedral interstitial atoms in inhomogeneous interaction fields is applied to the specific problem of the ordinary Snoek relaxation under the influence of the uniform static stress system (an external bias field). In the case of a uniaxial static bias stress system, an extremely accurate and simple analytical expression is deduced for the logarithmic decrement which indicates strong dependence on the magnitude, sign, and dir...
Comparison of the short and long-term degradation behaviors of as-cast pure Mg, AZ91 and WE43 alloys
Ocal, Ezgi Butev; ESEN, ZİYA; Aydınol, Mehmet Kadri; Dericioğlu, Arcan Fehmi (Elsevier BV, 2020-02-01)
The corrosion behaviors of pure magnesium, AZ91, and WE43 alloys have been evaluated by weight loss, hydrogen evolution rate, pH change measurements and potentiodynamic polarization as well as electrochemical impedance spectroscopy (EIS) methods. Main corrosion product formed on the surface of Mg/Mg-alloys after immersion of 24 h was Mg(OH)(2) on the other hand, at the end of the 20 days additional CaCO3 which was found to display a critical role in degradation characteristics of the samples, was found. Exa...
Citation Formats
T. YILDIRIM and A. Ç. Erçelebi, “THE GROUND-STATE DESCRIPTION OF THE OPTICAL POLARON VERSUS THE EFFECTIVE DIMENSIONALITY IN QUANTUM-WELL-TYPE SYSTEMS,” JOURNAL OF PHYSICS-CONDENSED MATTER, pp. 1271–1277, 1991, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/52355.