Showing papers on "Charge transfer insulators published in 1987"
TL;DR: In this paper, a theory of the electron drift velocity in insulating liquids and glasses is presented based upon the assumption of a dynamic equilibrium existing between electrons in traps and electrons in the conduction band.
Abstract: Excess electrons can be introduced into insulators by ionizing radiation or electrical discharge. We present a theory of the electron drift velocity in insulating liquids and glasses which is based upon the assumption of a dynamic equilibrium existing between electrons in traps and electrons in the conduction band. Using statistical thermodynamics, we relate the electron drift mobility to parameters which can be operationally defined in terms of experiments. Among these parameters are the electron effective mass in the conduction band, the Hall mobility, the photocurrent threshold energy, the volume fraction of the traps, and the coordination number and vibrational frequencies of the atoms binding the electron to the trap.
9 citations
TL;DR: In this article, a balance equation of the charge carrier transport process in the insulator regime (long-time process, time dependent injection, long-time stable space charges) is established.
Abstract: A balance equation of the charge carrier transport process in the insulator regime (long-time process, time dependent injection, long-time stable space charges) is established. The equation describes the stochastic hopping process between localized levels, having random distribution in space and energy. The specific aspect of the model is the stochastic treatment of the non-equilibrium dynamics of the space charge for the photo-electric and the insulator regimes.
2 citations
01 Jan 1987
TL;DR: In this article, a quasiparticle theory for the band gaps and excitation spectra of semiconductors and insulators is reviewed and the non-local energy-dependent electron self-energy operator is calculated from first principles using the full dielectric matrix and the dressed Green's function.
Abstract: A quasiparticle theory for the band gaps and excitation spectra of semiconductors and insulators is reviewed. In this approach, the nonlocal energy-dependent electron self-energy operator is calculated from first principles using the full dielectric matrix and the dressed Green's function. Experimental spectra are properly interpreted as transitions between quasiparticle states of an interacting many-body system. Application to covalent materials as well as large gap ionic compounds showed that the effects of local fields and dynamical screening are crucial for accurate results. With no empirical input, the calculated band gaps, optical transitions, and band dispersions are all within a few percent of experimental values.
2 citations