THE TEMPERATURE PROPERTIES OF THIN FILM PIEZOELECTRIC MATERIALS

ABSTRACT

Based on quantum transport theory, we analysis the temperature dependence of optical quantum transition line shapes (QTLS) of GaAs and CdS in some temperatures, through the numerical analysis of theoretical result. We study the thermal properties of electron-piezoelectric phonon interacting system in the confinement of electrons by square well confinement potential. In order to analysis the quantum transition process, we compare the temperature dependence of the QTLW and the QTLS of two transition process, which are the phonon emission transition process and the phonon absorption transition process. We use the theory of the projected Liouville equation method with Equilibrium Average Projection Scheme (EAPS).

Keywords:

• quantum transport theory
• projected Liouville equation method
• Equilibrium Average Projection Scheme (EAPS)
• response formula and the scattering factor formula
• electron phonon coupling system
• the quantum transition line shapes(QTLS) and the quantum transition Line Widths (QTLW).

ACKNOWLEDGMENTS

This paper was supported by Dong-A University Research Fund in 2006.