THE TWO-DIMENSIONAL MAGNETO-POLARON IN THE STRONG-COUPLING REGIME

Date

1989-04-03

Author

Erçelebi, Ayşe Çiğdem

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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 internal structure of the magneto-polaron with varying magnetic field intensity is favoured as investigated by Wu, Peeters and Devreese (1985).

Subject Keywords

General Materials Science, Condensed Matter Physics

URI

https://hdl.handle.net/11511/41737

Journal

JOURNAL OF PHYSICS-CONDENSED MATTER

DOI

https://doi.org/10.1088/0953-8984/1/13/004

Collections

Department of Physics, Article

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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 GROUND-STATE DESCRIPTION OF THE OPTICAL POLARON VERSUS THE EFFECTIVE DIMENSIONALITY IN QUANTUM-WELL-TYPE SYSTEMS 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.
A two-dimensional polaronic donor in a magnetic field Erçelebi, Ayşe Çiğdem (IOP Publishing, 1988-3-30) The effect of electron-phonon coupling on a two-dimensional donor in a magnetic field is studied variationally. It is observed that the influence of the magnetic field on the phonon-induced shift in the binding energy is more marked for stronger Coulomb potentials and larger phonon couplings. Even though the magnetic field enhances electron-phonon coupling in an absolute sense, for cyclotron frequencies larger than the LO phonon frequency the relative shift (with respect to the unperturbed binding energy) i...
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Citation Formats

A. Ç. Erçelebi, “THE TWO-DIMENSIONAL MAGNETO-POLARON IN THE STRONG-COUPLING REGIME,” JOURNAL OF PHYSICS-CONDENSED MATTER, pp. 2321–2326, 1989, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41737.