The electronic structure of a quantum well under an applied electric field

Sari, H
Ergun, Y
Sokmen, I
Tomak, Mehmet
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


Subband structure and excitonic binding of graded GaAs/Ga1-xAlxAs quantum wells under an electric field
Sari, H; Ergun, Y; Elagoz, S; Kasapoglu, E; Sokmen, I; Tomak, Mehmet (Elsevier BV, 1998-01-01)
The effects of an applied electric field on subband energies and excitonic binding for a graded GaAlAs quantum well are calculated variationally within the effective mass approximation. The very sensitive dependence of subband energies on the applied field is calculated using a model potential profile and exact electron and hole wavefunctions. Our calculations have revealed the dependence of the energy shifts of subbands, and excitonic binding on the field direction in the graded quantum well. This permits ...
Screening effect on the binding energies of shallow donors, acceptors and excitons in finite-barrier quantum wells
Akbas, H; Aktas, S; Okan, SE; Ulas, M; Tomak, Mehmet (Elsevier BV, 1998-01-01)
The conduction and valence subband energies in the presence of an electric field are calculated using the fifth-order Runge-Kutta method. The binding energies of shallow donors, accepters and excitons in finite-barrier GaAs/Ga1-xAlx As quantum wells are then obtained variationally in the presence of a magnetic field. The effects of a spatially dependent screening function epsilon(r) On the calculation of binding energies are specifically investigated. The use of epsilon(r) in comparison with the use of a co...
1,3-Dipolar Cycloaddition Reactions of 1-Methyl-3-Oxidopyridinium Betaine with C-70-A Theoretical Study
Türker, Burhan Lemi; Gumus, Selcuk (American Scientific Publishers, 2009-04-01)
In the present study, the molecular orbital properties of 1,3-dipolar cycloaddition products of 1-methyl-3-oxidopyridinium betaine with C-70 have been investigated theoretically at the level of PM3 (RHF) type semi empirical quantum chemical calculations and then single point DFT calculations were performed for the energies. The betaine acts as a 4 pi-component across its 2,6-positions and certain C=C bonds of C-70 act as 2 pi-component in the 1,3-dipolar cycloadditions considered presently. Various cycloadd...
Resonant Raman scattering near the free-to-bound transition in undoped p-GaSe
Hasanlı, Nızamı; Ozkan, H (Wiley, 2001-01-01)
Raman spectra of GaSe layered crystal have been measured using a He-Ne laser and temperature tuning the free-to-bound gap in the range 10-290 K. Resonance enhancement of E'((12)) mode has been observed for both incident and scattered photon energies equal to the free-to-bound transition energy.
YILDIRIM, T; Erçelebi, Ayşe Çiğdem (IOP Publishing, 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.
Citation Formats
H. Sari, Y. Ergun, I. Sokmen, and M. Tomak, “The electronic structure of a quantum well under an applied electric field,” SUPERLATTICES AND MICROSTRUCTURES, pp. 163–172, 1996, Accessed: 00, 2020. [Online]. Available: