Optical vibration modes and electron–phonon interaction in ternary mixed crystals of polar semiconductors

2004 ◽  
Vol 13 (1) ◽  
pp. 71-81 ◽  
Author(s):  
Liang Xi-Xia ◽  
Ban Shi-Liang
Keyword(s):  
Mixed Crystals ◽  
Vibration Modes ◽  
Phonon Interaction ◽  
Electron Phonon Interaction ◽  
Optical Vibration

THE REFLECTIVITY OF THE MIXED CRYSTAL AB1-xCx

2010 ◽  
Vol 24 (27) ◽  
pp. 5337-5343
Author(s):  
XIAOYAN ZHANG ◽  
JINGFENG WANG ◽  
GUOLIANG FAN
Keyword(s):  
Mixed Crystal ◽  
Random Element ◽  
Mixed Crystals ◽  
Phonon Interaction ◽  
Long Wavelength ◽  
Electron Phonon Interaction ◽  
The Third ◽  
Optical Character ◽  
Mode Behavior ◽  
The One

The properties of long wavelength optical phonons in mixed crystals AB 1-x C x is discussed by a model similar to Modified Random Element Isodisplacement (MREI). Using this method we investigate the frequencies, the dielectric functions, and the reflectivity of several mixed crystals. It is found that this model can be applied to the one-mode behavior, the two-mode behavior, and that of the third category. So the model provides a possible way to understand the optical character of the ternary mixed crystal. Based on it, we can discuss other problems similar to electron–phonon interaction and so on.

Electron–phonon interaction in three-, two- and one-dimensional ternary mixed crystals

2016 ◽  
Vol 30 (15) ◽  
pp. 1650182
Author(s):  
Junhua Hou ◽  
Yunpeng Fan
Keyword(s):  
Cell Volume ◽  
Effective Mass ◽  
Unit Cell Volume ◽  
Three Dimensional ◽  
Unit Cell ◽  
Mixed Crystals ◽  
Phonon Interaction ◽  
One Dimensional ◽  
Electron Phonon Interaction ◽  
Self Trapping

The electron–phonon (e–p) interaction in three-dimensional (3D), two-dimensional (2D) and one-dimensional (1D) ternary mixed crystals is studied. The e–p interaction Hamiltonians including the unit cell volume variation in ternary mixed crystals are obtained by using the modified random-element-isodisplacement model and Born–Huang method. The polaronic self-trapping energy and renormalized effective mass of GaAs[Formula: see text]Sb[Formula: see text], GaP[Formula: see text]As[Formula: see text] and GaP[Formula: see text]Sb[Formula: see text] compounds are numerically calculated. It is confirmed theoretically that the nonlinear variation of the self-trapping energy and effective mass with the composition is essential and the unit cell volume effects cannot be neglected except the weak e–p coupling. The dimensional effect cannot also be ignored.

Electron–phonon interaction in quasi-1D ternary mixed crystals of polar semiconductors

2015 ◽  
Vol 29 (23) ◽  
pp. 1550130 ◽  
Author(s):  
Yunpeng Fan ◽  
Junhua Hou
Keyword(s):  
Cell Volume ◽  
Unit Cell Volume ◽  
Mixed Crystal ◽  
Random Element ◽  
Unit Cell ◽  
Mixed Crystals ◽  
Phonon Modes ◽  
Phonon Interaction ◽  
One Dimensional ◽  
Electron Phonon Interaction

The electron–optical-phonon interaction between an electron and two branches of LO-phonon modes in a quasi-one-dimensional ternary mixed crystal (TMC) of polar semiconductors is studied. The new electron–phonon interaction Hamiltonian including the unit-cell volume variation in TMCs is obtained by using the modified random element isodisplacement model and Born–Huang method. The energies of polaron are numerically calculated for several systems of III–V compounds. A group of III-nitride mixed crystals is also taken into numerical calculation in our theory. It is verified theoretically that the obvious nonlinearity of the polaronic energy and effective mass with the composition is essential and the unit-cell volume effects cannot be neglected except the very weak e–p coupling.

OPTICAL VIBRATION MODES IN SPHERICAL CORE-SHELL QUANTUM DOTS

2013 ◽  
Vol 27 (18) ◽  
pp. 1350134 ◽  
Author(s):  
Y. XING ◽  
X. X. LIANG ◽  
Z. P. WANG
Keyword(s):  
Quantum Dots ◽  
Core Shell ◽  
Vibration Modes ◽  
Electron Phonon Interaction ◽  
Interface Surface ◽  
System A ◽  
Surface Optical ◽  
Spherical Core ◽  
Dielectric Continuum ◽  
Optical Vibration

Using a dielectric continuum approach, the optical vibration modes in a spherical core-shell quantum dots (QDs) imbedded in a host nonpolar material are studied. The dispersion relation and the corresponding electron–phonon interaction Hamiltonian are derived. The numerical calculations for the CdSe/ZnS system are performed. The results reveal that there are three branches frequencies of interface/surface optical phonon in the system. A detailed discussion of the combined effects of the spatial confinement and dielectric mismatch between the dot and the host medium is given.

Electron-phonon interaction in mixed crystals

1999 ◽  
Vol 59 (23) ◽  
pp. 15422-15429 ◽  
Author(s):  
Ruisheng Zheng ◽  
Mitsuru Matsuura
Keyword(s):  
Mixed Crystals ◽  
Phonon Interaction ◽  
Electron Phonon Interaction
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