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Free electron model
About: Free electron model is a research topic. Over the lifetime, 4678 publications have been published within this topic receiving 103535 citations.
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TL;DR: Evolution of dielectric function of Al-doped ZnO (AZO) thin films with annealing temperature is observed and it is shown that the evolution is due to the changes in both the band gap and the free-Electron absorption as a result of the change of free-electron concentration of the AZO thin films.
Abstract: Evolution of dielectric function of Al-doped ZnO (AZO) thin films with annealing temperature is observed. It is shown that the evolution is due to the changes in both the band gap and the free-electron absorption as a result of the change of free-electron concentration of the AZO thin films. The change of the electron concentration could be attributed to the activation of Al dopant and the creation/annihilation of the donor-like defects like oxygen vacancy in the thin films caused by annealing.
22 citations
TL;DR: In this article, the authors show that the conduction band of CdSnAs 2 is characterized by a low electron effective mass, of the order of a few hundredths of the free electron mass.
22 citations
TL;DR: The experimentally determined values of the high and low temperature electrical and thermal conductivities of pure sodium, copper, silver, and gold are such that the ratios of these quantities for each of these metals do not agree with the values expected from the Bloch free electron theory, except for the high temperature Wiedemann-Franz ratio as mentioned in this paper.
Abstract: The experimentally determined values of the high and low temperature electrical and thermal conductivities of pure sodium, copper, silver, and gold are such that the ratios of these quantities for each of these metals do not agree with the values expected from the Bloch free electron theory, except for the high temperature Wiedemann-Franz ratio. Reasonable agreement can be achieved by assuming (i) that the conduction electrons can interact directly with transverse lattice vibrations, and (ii) that the Fermi surface departs significantly from spherical shape in all these metals, and touches the boundary of the Brillouin zone in the case of copper, silver, and gold.
22 citations
TL;DR: Developpement d'une technique des interferences optiques non lineaires dans la generation des harmoniques secondaires de surface, pour mesurer directement la variation de the susceptibilite non lineaire of the surface de CO/Ni(110) en fonction du recouvrement en CO.
Abstract: A nonlinear-optical-interference technique in surface second-harmonic generation is developed to measure directly the variation of surface nonlinear susceptibility of CO/Ni(110) as a function of the CO coverage. It is found that some of the susceptibility elements vary linearly with the coverage and others nonlinearly. A simple model suggests that the former are dominated by contributions from nearly free electrons, while the latter by contributions from the more localized electrons.
22 citations
15 Oct 1990-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, the consequences of short micropulses on the output of infrared and far-infrared free electron lasers with special reference to the FELIX project which operates with 3 ps long electron pulses are discussed.
Abstract: We discuss the consequences of short micropulses on the output of infrared and far-infrared free electron lasers with special reference to the FELIX project which operates with 3 ps long electron pulses.
22 citations