An EPR Study of a Germanium-Vacancy Defect in Diamond

2016 ◽  
Keyword(s):  
Vacancy Defect

Dependence of the Ferromagnetism on Vacancy Defect in Annealed In 2 O 3 Nanocrystals: A Positron Annihilation Study

2021 ◽  
pp. 2000631
Author(s):  
Zihao Wang ◽  
Xiumei Dong ◽  
Zhiyuan Chen ◽  
Houhua Xiong ◽  
Jie Gao ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Vacancy Defect ◽  
Positron Annihilation Study

scholarly journals Vacancy defect control of colossal thermopower in FeSb2

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Qianheng Du ◽  
Lijun Wu ◽  
Huibo Cao ◽  
Chang-Jong Kang ◽  
Christie Nelson ◽  
...  
Keyword(s):  
Phonon Scattering ◽  
Vacancy Defect ◽  
Electron Microscopic ◽  
First Principle Calculation ◽  
Conducting Path ◽  
Transmission Electron ◽  
Vacancy Ordering ◽  
Defect Control ◽  
Scanning Transmission ◽  
Monoclinic Distortion

AbstractIron diantimonide is a material with the highest known thermoelectric power. By combining scanning transmission electron microscopic study with electronic transport neutron, X-ray scattering, and first principle calculation, we identify atomic defects that control colossal thermopower magnitude and nanoprecipitate clusters with Sb vacancy ordering, which induce additional phonon scattering and substantially reduce thermal conductivity. Defects are found to cause rather weak but important monoclinic distortion of the unit cell Pnnm → Pm. The absence of Sb along [010] for high defect concentration forms conducting path due to Fe d orbital overlap. The connection between atomic defect anisotropy and colossal thermopower in FeSb2 paves the way for the understanding and tailoring of giant thermopower in related materials.

Identification of the oxygen-vacancy defect containing a single hydrogen atom in crystalline silicon

2000 ◽  
Vol 61 (7) ◽  
pp. 4659-4666 ◽  
Author(s):  
P. Johannesen ◽  
B. Bech Nielsen ◽  
J. R. Byberg
Keyword(s):  
Hydrogen Atom ◽  
Oxygen Vacancy ◽  
Crystalline Silicon ◽  
Vacancy Defect

Helium behaviour and vacancy defect distribution in helium implanted tungsten

2007 ◽  
Vol 362 (2-3) ◽  
pp. 181-188 ◽  
Author(s):  
A. Debelle ◽  
M.F. Barthe ◽  
T. Sauvage ◽  
R. Belamhawal ◽  
A. Chelgoum ◽  
...  
Keyword(s):  
Vacancy Defect ◽  
Defect Distribution

F-CENTER IMPACT ON PHOTOELECTROCHEMICAL PROPERTIES IN HEMATITE

2010 ◽  
Vol 24 (18) ◽  
pp. 1963-1970 ◽  
Author(s):  
ARVIDS STASHANS ◽  
RICHARD RIVERA
Keyword(s):  
Experimental Data ◽  
Optical Properties ◽  
Oxygen Vacancy ◽  
Quantum Chemical ◽  
Vacancy Defect ◽  
Chemical Model ◽  
Photoelectrochemical Properties ◽  
Structural And Optical Properties ◽  
F Center ◽  
Quantum Chemical Model

Structural and optical properties of F-center (two electrons trapped by an oxygen vacancy) defect in hematite have been studied using a quantum-chemical model. Calculated absorption energies, 0.9 eV and 3.6 eV, are discussed in terms of the available experimental data. An explanation for the origin of experimentally observed electron depletion in hematite is proposed.

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