The surface energy band structure of (Ce, Ag)/TiO 2 nanometer photocatalystic materials for purifying environment was studied by scanning tunneling microscopy and tunneling spectroscopy (STM/STS).
Atomic partial densities of states,charge density distributions,and surface band structures are calculated and analyzed on both Ga terminated surface and N terminated surface.
分析了得到的各原子分态密度、面电荷密度分布以及表面能带结构等性质 ,比较了 Ga N(0 0 1)的 Ga端表面和 N端表面两种情况 .
The aurum chemisorption on the GaAs(110) surface is investigated. The energy band structure and the density of surface states are studied and calculated by the infinitive orders perturbation theory developed by K.
The electronic structure of Ge(313) surface is studied by using the Green function method of the scattering theory. The bulk electronic structure is described by the nearest neighbor tight binding sp 3s * formalism proposed by Vogl et al.
For these structural models, we obtain electronic surface band structures which agree very good with a wealth of data from angle-resolved photoemission spectroscopy investigations.
Surface band structures bound states for the chemisorption structures HD and CN1.
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The calculated surface band structures show a widening of the band gap between occupied and empty surface states for increasing oxygen coverage.
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The multi-alkali photocathode (Rb, Cs) Na2KSb films are studied. The photo-cathode manufactured by means of a new technology has many advantages over the trialkali photocathode, such as higher photosensitivity, better reproducibility, less thermal emission and, particularly, much improved response to light in the green-red-infrared portion of the spectrum, photoelectron-emissive mechanism of the photocathode films are discussed and a new strcture model of energy bands at surface of the of the (Rb, Cs) Na2KS...
The aurum chemisorption on the GaAs(110) surface is investigated. The energy band structure and the density of surface states are studied and calculated by the infinitive orders perturbation theory developed by K. S. Dy and S. Y. Wu et al. The results show that two surface states are identified by absorption of the aurum on the surface, thereby eliminating the dangling band of gallium on the GaAs(110) surface. The two energy bands are located near Ev + 0.9 eV and Ev-0.7 eV in good agreement with the experim...
A new fabrication technology of the multialkali photocathode of[Cs,Rb]Na_2KSb structure is reported.Photoelectronemissive mechanism of the photocathode filmsis discussed and a new structure model of energy bands at the surface of [Cs,Rb]Na_2 KSbis proposed.