Modified Lee-Low-Pines Polaron in Spherical Quantum Dot in an Electric Field. Part 2: Weak Coupling and Temperature Effect

A. J. Fotue *

Department of Physics, Faculty of Science, Mesoscopic and Multilayers Structures Laboratory, University of Dschang, P.O.Box: 479 Dschang, Cameroon

N. Issofa

Department of Physics, Faculty of Science, Mesoscopic and Multilayers Structures Laboratory, University of Dschang, P.O.Box: 479 Dschang, Cameroon

M. Tiotsop

Department of Physics, Faculty of Science, Mesoscopic and Multilayers Structures Laboratory, University of Dschang, P.O.Box: 479 Dschang, Cameroon

S. C. Kenfack

Department of Physics, Faculty of Science, Mesoscopic and Multilayers Structures Laboratory, University of Dschang, P.O.Box: 479 Dschang, Cameroon

M. P. Tabue Djemmo

Department of Physics, Faculty of Science, Mesoscopic and Multilayers Structures Laboratory, University of Dschang, P.O.Box: 479 Dschang, Cameroon and Department of Physics, Laboratory of Mechanics and Modeling of Physical Systems, Faculty of Science, University of Dschang, P.O.Box 67 Dschang, Cameroon

A. V. Wirngo

Department of Physics, Faculty of Science, Mesoscopic and Multilayers Structures Laboratory, University of Dschang, P.O.Box: 479 Dschang, Cameroon

H. Fotsin

Department of Physics, Faculty of Science, Laboratory of Electronics and Signal Processing, University of Dschang, P.O.Box 67, Dschang, Cameroon

L. C. Fai

Department of Physics, Faculty of Science, Mesoscopic and Multilayers Structures Laboratory, University of Dschang, P.O.Box: 479 Dschang, Cameroon

*Author to whom correspondence should be addressed.


Abstract

In this paper, we investigate the influence of an electric field on the ground state energy of a polaron in a spherical semiconductor quantum dot (QD) using the modified Lee Low Pines (LLP) method. The numerical results show an increase of the ground state energy with the increase of the electric field and the confinement lengths. The modulation of the electric and the confinement lengths enables the control of the decoherence of the system. It is also seen that the temperature is a decreasing function of the electron-phonon coupling constant and the longitudinal confinement length, whereas it increases with the electric field strength. 

Keywords: Electric field, modified LLP, polaron energy, quantum dot, weak coupling


How to Cite

J. Fotue, A., N. Issofa, M. Tiotsop, S. C. Kenfack, M. P. Tabue Djemmo, A. V. Wirngo, H. Fotsin, and L. C. Fai. 2015. “Modified Lee-Low-Pines Polaron in Spherical Quantum Dot in an Electric Field. Part 2: Weak Coupling and Temperature Effect”. Physical Science International Journal 7 (2):97-106. https://doi.org/10.9734/PSIJ/2015/18439.

Downloads

Download data is not yet available.