Point Defects
Regularity and locality of point defects in multilattices
... by defects in the crystalline lattice [25]. These range from point defects (the subject of the present work) including vacancies, interstitials, impurities; line defects including the ...
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Point Defects in Strontium and Barium Titanate from First Principles: Properties and Thermodynamics.
... individual point defects on a timescale of days to weeks, using quantum ...on point defects have been slower to catch ...individual point defects alone are insufficient to ...
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The Influence of Point Defects on the Thermal Conductivity of AlN and GaN
... set point based on the limits of accuracy for the instrumentation used in measuring each ...specific point defects compared to lower bandgap ...of point defects present in the AlN ...
211
Point defects, topological chirality, and singularity theory in cholesteric liquid crystal droplets
... The mathematical result of Eliashberg and Thurston represents a fundamental physical property of chiral mate- rials that has not previously been recognized. We bring its application to physical phenomena for the first ...
19
First Principles Calculation of Point Defects in Uranium Dioxide
... in various types of defects. The components of the first nearest neighbor (‘‘n.n.’’ hereafter), 2nd n.n. and 3rd n.n. U atoms are plotted in red, green and blue, respectively. The ‘‘reference sites’’ to which the ...
7
Identification of point defects in treated single crystal diamond
... exploited. Defects are broadly characterised as: point defects, bounded on the atomic scale in three dimensions ...line defects, bounded on the atomic scale in two dimensions ...surface ...
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Two-site diamond-like point defects as new single-photon emitters
... systems, point defects in crystalline materials form the tiniest ...crystalline point defects, which have the ability to act as single-photon sources, among others, and which can be new ...
6
Point Defects in AlN and Al-rich AlGaN from First Principles.
... In Chapter 4 (originally published in Physical Review Materials), oxygen and silicon point defects in Al 0.65 Ga 0.35 N are discussed. [ Har19 ] In this study, the formation energies of O N and Si Al are ...
148
First-Principles Calculations of the Formation and Structures of Point Defects on GaN (0001) Surface
... Theoretical modeling of crystal surfaces can reveal the microscopic structure and properties of the surface electrons, and, thus, provide insights that cannot be obtained experimentally. For example, plane-wave ultrasoft ...
7
Electron paramagnetic resonance studies of point defects in diamond : quantification, spin polarisation and preferential orientation
... The electronic properties of diamond have come under increased interest in recent years, boron doping is used to increase the conductivity of diamond opening up many applications. High breakdown voltage and hole mobility ...
227
A STUDY OF POINT DEFECTS IN CRYSTALLINE AND AMORPHOUS SILICON
... The point defects are produced by high-energy ...of point defects some change in the hybridization of the silicon atoms that surrounds the defect (hole) is ...
6
Magnetic resonance studies of point defects in diamond
... This Thesis reports data derived from a variety of experimental techniques. How- ever, the bulk the of data results from electron paramagnetic resonance (EPR) experiments which are briefly introduced in Section 1.7. A ...
236
Scanning tip measurement for identification of point defects
... of defects domi- nates the characteristics; charge captured on these defects can follow only the low frequency ...deep-level defects generated outside the Fe-deposited region was found in about 5 × ...
5
EMPIRICAL MODELS FOR STRUCTURAL EFFECTS OF A-SITE POINT DEFECTS AND ORDERING IN PEROVSKITES
... reactions were checked for phase purity using X-ray diffraction, scanning electron microscopy, and either energy dispersive spectroscopy or wavelength dispersive spectroscopy. Structural parameters were characterized ...
226
Colloquium : disclination loops, point defects, and all that in nematic liquid crystals
... its defects, classify those, and then glue them back together? These considerations motivate the intro- duction of auxiliary spaces: measuring surfaces of fixed topology contained in the ...
20
Defective TiO2 with Intrinsic Point Defects for Photocatalytic Hydrogen Production: A Review
... acceptor defects. Various preparation methods such as hydrogenation, reduction, oxidation, solvothermal, and atomic layer deposition (ALD) have been utilized to form either intrinsic donor defects or ...
22
Optical and magnetic resonance studies of point defects in single crystal diamond
... The annealing results obtained for 1.521 eV during this study are qualitatively similar across both emission and absorption (figures 5-6 (absorption) and 5-10), and broadly similar to the results obtained by Campbell ...
221
Diffusion of point defects in crystalline silicon using the kinetic activation relaxation technique method
... as the monovacancy and monointerstitial migration barriers. The number of possible barriers, however, is found to be much larger than what had previously been found, with those relevant at 500 K multiplying the ...
13
First principles study of intrinsic point defects in hexagonal barium titanate
... Using first-principles calculations a value of ε = 57 was obtained for barium titanate 34 , this value was used in the present work. The next term in the multipole expansion relates to monopole- dipole interactions. ...
26
A study of point defects in CVD diamond using electron paramagnetic resonance and optical spectroscopy
... individual defects containing hydrogen in diamond [156][111], a full description of the mechanisms for defect creation and destruction has not been ...related defects will be ...
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