Influences of temperature and polaron effect on the ground state of quasi-two-dimensional strong-coupling exciton;

The influences of lattice vibration and polaron effects on the ground state and the excited state of the system,for which the exciton is strongly coupled with interface-optical (IO) phonons but weakly or intermediately coupled with bulk-longitudinal-optical (LO) phonons in a quantum well,are studied using the linear-combination operator and the LLP variational method.

Within the framework of the effective-mass approximation, hydrogenic impurity states and the polaron effect in the strain GaN/Al_xGa_(1-x)N cylindrical wurtzite quantum dot are investigated by considering the influence of infinite barriers.

A modified LLP variational method is adopted to discuss the polaronic effect on the binding energy of an impurity in an infinite quantum well by considering the pressure and screening effects.

Four molecular structure parameters of sulfides and mercaptans were obtained, which were the molecular polarizability effect index(MPEI), the effective topological steric effect index(ETSEI), the number of carbon(N) and Wiener three-walk path(P_3).

Based on the molecular polarizability effect index,a formula of three parameters was proposed to calculate the boiling point of aliphatic aldehydes and alkanones.

Where the parameter SBL is the sum of bond length in the molecule, AMPEI is the difference of molecular polarizability effect index between the normal chain isomer and the branched chain isomer which bearing same carbon atom number for the paraffin or alcohol.

Using the energy band diagram and photoelectric response spectrum,the influence of the interface polarization effects on the photoelectric response of the photodetector is analyzed.