scholarly journals Ab initio study of the electron energy loss function in a graphene-sapphire-graphene composite system

2017 ◽  
Vol 96 (7) ◽  
Author(s):  
Vito Despoja ◽  
Tijana Djordjević ◽  
Lazar Karbunar ◽  
Ivan Radović ◽  
Zoran L. Mišković
Keyword(s):  
Energy Loss ◽  
Ab Initio ◽  
Electron Energy ◽  
Loss Function ◽  
Composite System ◽  
Ab Initio Study ◽  
Energy Loss Function ◽  
Graphene Composite ◽  
Electron Energy Loss

Effective energy loss function of silver derived from reflection electron energy loss spectra

2006 ◽  
Vol 38 (4) ◽  
pp. 632-635 ◽  
Author(s):  
Z. M. Zhang ◽  
Z. J. Ding ◽  
H. M. Li ◽  
K. Tőkési ◽  
D. Varga ◽  
...  
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Loss Function ◽  
Effective Energy ◽  
Energy Loss Function ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra

Analytical modeling of electron energy loss spectroscopy of graphene: Ab initio study versus extended hydrodynamic model

2018 ◽  
Vol 184 ◽  
pp. 134-142 ◽  
Author(s):  
Tijana Djordjević ◽  
Ivan Radović ◽  
Vito Despoja ◽  
Keenan Lyon ◽  
Duško Borka ◽  
...  
Keyword(s):  
Energy Loss ◽  
Ab Initio ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Hydrodynamic Model ◽  
Analytical Modeling ◽  
Ab Initio Study ◽  
Electron Energy Loss

Characterization of the Electronic Structure and Optical Properties of Al2O3, ZrO2 and SrTiO3 from Analysis of Reflection Electron Energy Loss Spectroscopy in the Valence Region

2003 ◽  
Vol 786 ◽  
Author(s):  
G. L. Tan ◽  
L. K. Denoyer ◽  
R. H. French ◽  
A. Ramos ◽  
M. Gautier-Soyer ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Energy Loss ◽  
Electron Energy ◽  
Loss Function ◽  
Electron Energy Loss Spectroscopy ◽  
Oxide Materials ◽  
Energy Loss Function ◽  
Electron Energy Loss

ABSTRACTCharacterization of thin surficial films of oxides has become the focus of increased interest due to their applications in microelectronics. The ability to experimentally determine the electronic structure and optical properties of oxide materials permits the direct study of the interband transitions from the valence to the conduction band states. In the past years there has been much progress in the quantitative analysis of transmission electron energy loss spectroscopy (TEELS) in the electron microscopeHere we employed reflection electron energy loss function (REELS) as well as vacuum ultraviolet (VUV) spectroscopy to determine the dielectric functions of oxide materials, i.e. Al2O3, ZrO2 and SrTiO3. The two main steps in the analysis are the removal of the effects of multiple scattering from the REELS spectra followed by application of the Kramers-Kronig dispersion transforms to the single scattering energy loss function to determine the conjugate optical variable and then the complex dielectric function. The surface and bulk plasma resonance spectra for these oxide materials have been determined from VUV and REELS, along with the influence of primary electron energy on the REELS results. The relative contribution of surface and bulk plasmon oscillation in REELS has been investigated. Comparison with VUV results and existing TEELS results indicate that Kramers-Kronig analysis can also be applied to REELS spectra and the corresponding conjugate optical properties can be obtained. Quantitative studies of the electronic structure and optical properties of thin surficial films using VUV and REELS or TEELS, represent a new avenue to determine the properties of these increasingly important films.

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