Effect of phonon dispersion on weak-coupling polaron in a parabolic quantum dot

Abstract

Abstract:

The influence of the phonon dispersion on the properties of the weak-coupling polaron in a parabolic quantum dot was studied by using the linear combination operator and unitary transformation method. Taking account of the longitudinal optical (LO) phonons dispersion in a parabolic approximation, the ground state energy and the self-trapping energy of the polaron in a parabolic quantum dot as a function of the effective confinement length of the quantum dot, the electron-LO-phonon coupling constant and the coefficient of the phonon dispersion were obtained. Numerical calculation results show that the ground state energy decreases with increasing the coefficient of the phonon dispersion, the self-trapping energy increases with increasing the coefficient of phonon dispersion.

Key words: optoelectronics, parabolic quantum dot, polaron, linear combination operator, phonon dispersion

CLC Number:

O469

YANG Hong-tao, JI Wen-hui, Huhemandula. Effect of phonon dispersion on weak-coupling polaron in a parabolic quantum dot[J]. J4, 2015, 32(2): 241-245.

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