EXAFS Study of Semimagnetic Semiconductors Zn1-xMnxTe: Mn 3d Electronic States and Mn-Te Local Coordination

1993 ◽  
Vol 32 (S2) ◽  
pp. 643 ◽  
Author(s):  
Naohisa Happo ◽  
Hitoshi Sato ◽  
Shinya Hosokawa ◽  
Yoshifumi Ueda ◽  
Masaki Taniguchi
Keyword(s):  
Electronic States ◽  
Local Coordination ◽  
Exafs Study ◽  
Semimagnetic Semiconductors

A surface EXAFS study of the local coordination of barium atoms at the active-sites of thermionic cathodes

Vacuum ◽  
1988 ◽  
Vol 38 (4-5) ◽  
pp. 401-404 ◽  
Author(s):  
G Thornton ◽  
I.W. Owen ◽  
C.H. Richardson ◽  
D Norman ◽  
R.A. Tuck ◽  
...  
Keyword(s):  
Active Sites ◽  
Local Coordination ◽  
Thermionic Cathodes ◽  
Exafs Study

Localized electronic states in amorphous semiconductors

1977 ◽  
Vol 55 (11) ◽  
pp. 1920-1929 ◽  
Author(s):  
David Adler ◽  
Ellen J. Yoffa
Keyword(s):  
Electronic Structure ◽  
Simple Model ◽  
Hubbard Model ◽  
Minimum Energy ◽  
Electronic States ◽  
Amorphous Semiconductors ◽  
Localized States ◽  
Local Coordination ◽  
Defect Sites ◽  
Almost All

The experimental results pertaining to the electronic structure of covalent amorphous semiconductors are briefly reviewed. It is found that three classes of materials exist, depending on the lowest-energy coordination of the predominant chemical component. In each case, the transport properties are ordinarily controlled by the localized states in the gap resulting from the minimum-energy defect sites, in which the local coordination is not optimal for certain atoms. These localized states are treated in terms of a Hubbard model, in which the effective repulsion between two electrons simultaneously present on the same center is taken as positive for tetrahedrally bonded solids and negative for chalcogenide and pnictide glasses. The electronic structure is discussed in detail. It is shown that even such a simple model can account for almost all of the experimental properties of the major classes of amorphous semiconductors.

Integration of Core-Edge Spectroscopy Methods for the Study of Polymers

1996 ◽  
Vol 54 ◽  
pp. 154-155
Author(s):  
E. G. Rightor
Keyword(s):  
Excited State ◽  
Polymer Blends ◽  
Gas Phase ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Electronic States ◽  
Core Electron ◽  
Bulk Solids ◽  
Development Application

Core edge spectroscopy methods are versatile tools for investigating a wide variety of materials. They can be used to probe the electronic states of materials in bulk solids, on surfaces, or in the gas phase. This family of methods involves promoting an inner shell (core) electron to an excited state and recording either the primary excitation or secondary decay of the excited state. The techniques are complimentary and have different strengths and limitations for studying challenging aspects of materials. The need to identify components in polymers or polymer blends at high spatial resolution has driven development, application, and integration of results from several of these methods.

Electronic States near the Fermi Level in the Antiferromagnetic and Ferromagnetic Spinels of Zn 1− x Cu x Cr 2 Se 4 ; 0.0 ≤ x ≤ 1.0

2002 ◽  
Vol 75 (4-5) ◽  
pp. 359-371
Author(s):  
M. Hidaka ◽  
N. Tokiwa ◽  
M. Yoshimura ◽  
H. Fujii ◽  
Jae-Young Choi ◽  
...  
Keyword(s):  
Fermi Level ◽  
Electronic States

Electronic states of the Cs+ ion

1997 ◽  
Vol 94 ◽  
pp. 1794-1801 ◽  
Author(s):  
C Destandau ◽  
G Chambaud ◽  
P Rosmus
Keyword(s):  
Electronic States

EXAFS Study of Refractory Cement Phases: CaAl2O14H20, Ca2Al2O13H16, and Ca3Al2O12H12

1995 ◽  
Vol 5 (11) ◽  
pp. 1849-1864 ◽  
Author(s):  
N. Richard ◽  
N. Lequeux ◽  
P. Boch
Keyword(s):  
Refractory Cement ◽  
Exafs Study

EXAFS STUDY ON RADIATION INDUCED DEFECTS

1986 ◽  
Vol 47 (C8) ◽  
pp. C8-1045-C8-1048
Author(s):  
T. BOLZE ◽  
J. PEISL
Keyword(s):  
Radiation Induced ◽  
Exafs Study ◽  
Induced Defects

EXAFS STUDY OF c-Si, a-Si AND a-Si : H

1986 ◽  
Vol 47 (C8) ◽  
pp. C8-379-C8-382 ◽  
Author(s):  
A. MENELLE ◽  
A. M. FLANK ◽  
P. LAGARDE ◽  
R. BELLISSENT
Keyword(s):  
Exafs Study

EDGE AND EXAFS STUDY OF CHARCOAL SUPPORTED Pt-Fe CATALYSTS

1986 ◽  
Vol 47 (C8) ◽  
pp. C8-297-C8-300 ◽  
Author(s):  
B. MORAWECK ◽  
P. BONDOT ◽  
D. GOUPIL ◽  
P. FOUILLOUX ◽  
A. J. RENOUPREZ
Keyword(s):  
Exafs Study ◽  
Fe Catalysts
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