The Optical Polaron And Volume Effect In Low Dimension Ternary Mixed Crystals Of Polar Semiconductor

With the quick development of quantum communication,quantum computation and nano electronics of low dimensional material,which on the high-innovation-technology of low dimension material.Low dimensional mixed crystal semiconductor material has become one of the hottest research fields on advanced materials.At present,with wide application for the good synthetic materials of super lattice,quantum dots,quantum wire and quantum wells and rapid development of semiconductor material growth technology,its are discussed a series of related problems about optical properties,superconducting and phase transition of low dimensional material structures.Different from the three dimensional material,the electron motion is restricted and the phonon system is modulated which shows a lot of unique physical properties in the low dimensional structure.It has great significance to study the microstructure of the low dimensional mixed crystal semiconductor materials for the preparation and development of optoelectronic devices.Different from the three dimensional material,the electron motion is restricted and the phonon system is modulated which shows a lot of unique physical properties in the low dimensional structure.It has great significance to study the microstructure of the low dimensional mixed crystal semiconductor materials for the preparation and development of optoelectronic devices.The electron-optical phonon coupling constant,self trapping energy and renormalized effective mass of one-dimensional optical polaron will change with mixed crystal components.we are discussed the three?tow and one-dimensional optical polaron effect of the three mixed in the semiconductor crystal.One-dimensional optical polaron energy are calculated which wurtzite nitrides and phosphides of the typical mixed crystal semiconductors material,and we found that the ternary mixed crystal unit-cell volume effect has a close relation to electron-phonon coupling strength and unit-cell volume mismatch rate.For stronger coupling,unit-cell mismatch rate is high,and the impact of the volume change would greater.Only when unit-cell volume change rate smaller and electron-phonon coupling strength is weak,the influence of volume effect is negligible.Nitride mixed crystal has a larger electron-phonon coupling constants and a larger unit-cell mismatch rate,we can found that the nonlinearity of curves for optical polaron effect is more obvious,and the unit-cell volume effect can not be ignored.Due to the limited dimension,nonlinear optical polaron effect of 2D[28] more than 3D[27];And nonlinear optical polaron effect of one dimensional much weaker than 2D,it is inconsistent with electronic and optical phonon coupling which the decrease of its structural dimensions and enhance the expected results.Because in the nanostructures the plane wave of electrons is not comprehensive,and this problem will be discussed in the later study.