Fe implantation induced lattice defects and their recovery in GaN

2021 ◽  
Vol 243 (1) ◽  
Author(s):  
K. Bharuth-Ram ◽  
D. Naidoo ◽  
V. Adoons ◽  
C. Ronning
Keyword(s):  
Lattice Defects ◽  
Fe Implantation

Contrast in Scanning Images of Thin Crystals

1972 ◽  
Vol 30 ◽  
pp. 520-521
Author(s):  
S. Kimoto ◽  
H. Hashimoto ◽  
S. Takashima ◽  
R. M. Stern ◽  
T. Ichinokawa
Keyword(s):  
Crystal Surface ◽  
Solid Angle ◽  
Incident Angle ◽  
Intensity Variation ◽  
Lattice Defects ◽  
Scanning Microscope ◽  
Electron Detector ◽  
Backscattered Electrons ◽  
Electron Image ◽  
Backscattered Electron

The most well known application of the scanning microscope to the crystals is known as Coates pattern. The contrast of this image depends on the variation of the incident angle of the beam to the crystal surface. The defect in the crystal surface causes to make contrast in normal scanning image with constant incident angle. The intensity variation of the backscattered electrons in the scanning microscopy was calculated for the defect in the crystals by Clarke and Howie. Clarke also observed the defect using a scanning microscope.This paper reports the observation of lattice defects appears in thin crystals through backscattered, secondary and transmitted electron image. As a backscattered electron detector, a p-n junction detector of 0.9 π solid angle has been prepared for JSM-50A. The gain of the detector itself is 1.2 x 104 at 50 kV and the gain of additional AC amplifier using band width 100 Hz ∼ 10 kHz is 106.

Crystal structure-size relationship in ultrafine metallic particles

1989 ◽  
Vol 47 ◽  
pp. 266-267
Author(s):  
Jun Liu ◽  
Mehmet Sarikaya ◽  
Ilhan A. Aksay
Keyword(s):  
Ultrafine Particles ◽  
Carbon Film ◽  
Lattice Defects ◽  
Careful Examination ◽  
Seeded Growth ◽  
Gold Particles ◽  
Metallic Particles ◽  
Interfacial Structures ◽  
Typical Particle ◽  
Many Particles

Ultrafine particles usually have unique physical properties. This study illustrates how the lattice defects and interfacial structures between particles are related to the size of ultrafine crystalline gold particles.Colloidal gold particles were produced by reducing gold chloride with sodium citrate at 100°C. In this process, particle size can be controlled by changing the concentration of the reactant. TEM samples are prepared by transferring a small amount of solution onto a thin (5 nm) carbon film which is suspended on a copper grid. In this work, all experiments were performed with Philips 430T at 300 kV.With controlled seeded growth, particles of different sizes are produced, as shown in Figure 1. By a careful examination, it can be resolved that very small particles have lattice defects with complex interfaces. Some typical particle structures include multiple twins, resulting in a five-fold symmetry bicrystals, and highly disordered regions. Many particles are too complex to be described by simple models.

MÖSSBAUER STUDIES OF SOLUTE ATOM ASSOCIATED WITH LATTICE DEFECTS IN METALS

1979 ◽  
Vol 40 (C2) ◽  
pp. C2-571-C2-572
Author(s):  
Y. Ishida ◽  
T. Ozawa ◽  
H. Ichinose ◽  
K. Sassa ◽  
M. Taniwaki ◽  
...  
Keyword(s):  
Solute Atom ◽  
Lattice Defects ◽  
Mössbauer Studies

MÖSSBAUER SPECTRUM OF57Fe AND119Sn ASSOCIATED WITH LATTICE DEFECTS IN ALUMINIUM

1974 ◽  
Vol 35 (C6) ◽  
pp. C6-309-C6-313
Author(s):  
M. KATO ◽  
Y. ISHIDA ◽  
K. SASSA ◽  
S. UMEYAMA ◽  
M. MORI
Keyword(s):  
Lattice Defects ◽  
Mossbauer Spectrum ◽  
Mössbauer Spectrum

A TEM study of lattice defects in naturally and experimentally deformed orthopyroxenes

1987 ◽  
Vol 110 (5) ◽  
pp. 497-512 ◽  
Author(s):  
Loeïz Nazé ◽  
Nicole Doukhan ◽  
Jean-Claude Doukhan ◽  
Khellil Latrous
Keyword(s):  
Lattice Defects

Highly Crystallized Na2CoFe(CN)6 with Suppressed Lattice Defects as Superior Cathode Material for Sodium-Ion Batteries

2016 ◽  
Vol 8 (8) ◽  
pp. 5393-5399 ◽  
Author(s):  
Xianyong Wu ◽  
Chenghao Wu ◽  
Congxiao Wei ◽  
Ling Hu ◽  
Jiangfeng Qian ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lattice Defects ◽  
Sodium Ion ◽  
Sodium Ion Batteries

Investigation of alumina lattice defects by means of thermoluminescence experiments

1989 ◽  
Vol 11 (11) ◽  
pp. 1657-1662 ◽  
Author(s):  
P. Brovetto ◽  
A. Delunas ◽  
V. Maxia ◽  
G. Spano ◽  
D. Mazza ◽  
...  
Keyword(s):  
Lattice Defects

scholarly journals Vortex states in an acoustic Weyl crystal with a topological lattice defect

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Qiang Wang ◽  
Yong Ge ◽  
Hong-xiang Sun ◽  
Haoran Xue ◽  
Ding Jia ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Lattice Defect ◽  
Three Dimensional ◽  
Surface States ◽  
Real Space ◽  
Lattice Defects ◽  
One Dimensional ◽  
Topological Features ◽  
Topological Lattice

AbstractCrystalline materials can host topological lattice defects that are robust against local deformations, and such defects can interact in interesting ways with the topological features of the underlying band structure. We design and implement a three dimensional acoustic Weyl metamaterial hosting robust modes bound to a one-dimensional topological lattice defect. The modes are related to topological features of the bulk bands, and carry nonzero orbital angular momentum locked to the direction of propagation. They span a range of axial wavenumbers defined by the projections of two bulk Weyl points to a one-dimensional subspace, in a manner analogous to the formation of Fermi arc surface states. We use acoustic experiments to probe their dispersion relation, orbital angular momentum locked waveguiding, and ability to emit acoustic vortices into free space. These results point to new possibilities for creating and exploiting topological modes in three-dimensional structures through the interplay between band topology in momentum space and topological lattice defects in real space.

ChemInform Abstract: LATTICE DEFECTS IN INDIUM OXIDE

1978 ◽  
Vol 9 (45) ◽  
Author(s):  
N. A. AHMED ◽  
Z. M. HANAFI ◽  
F. M. ISMAIL ◽  
S. A. NASSER
Keyword(s):  
Indium Oxide ◽  
Lattice Defects
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