Results 21 to 30 of about 1,387,503 (298)

Defect chemistry of bulk and nanoscale PuO2 [PDF]

open access: yes, 2022
The management of large stockpiles of Pu, separated from spent nuclear fuel or nuclear weapons programmes and stored as the oxide PuO2, requires an understanding of the material’s aging behaviour during interim storage. This includes characterising the effect of radiogenic impurities that accumulate at significant concentration over storage time ...
Neilson, William, Murphy, Samuel
openaire   +2 more sources

Localisation of defects with time and frequency measurements using pulsed arrays [PDF]

open access: yes, 2014
The frequency dependent directivity of the periodic permanent magnet transducer is to used extract information about the position of any discontinuities present in a sample. Two approaches are used; narrowband excitation, and broadband pulsed generation.
Hill, Samuel Joseph, Dixon, Steve M.
core   +1 more source

Point defects on the (110) surfaces of InP, InAs, and InSb : A comparison with bulk [PDF]

open access: yes, 2006
The basic properties of point defects, such as local geometries, positions of charge-transfer levels, and formation energies, have been calculated using density-functional theory, both in the bulk and on the (110) surface of InP, InAs, and InSb. Based on
Johansson, Börje,   +13 more
core   +1 more source

Effect of extended defects on photoluminescence of gallium oxide and aluminum gallium oxide epitaxial films

open access: yesScientific Reports, 2022
In this work, a systematic photoluminescence (PL) study on three series of gallium oxide/aluminum gallium oxide films and bulk single crystals is performed including comparing doping, epitaxial substrates, and aluminum concentration.
Jacqueline Cooke   +6 more
doaj   +1 more source

Advanced Mapping of Optically-Blind and Optically-Active Nitrogen Chemical Impurities in Natural Diamonds

open access: yesChemosensors, 2022
Natural diamonds with a rich variety of optically blind and optically active nitrogen impurity centers were explored at a nano/microscale on the surface and in bulk by a number of advanced chemical and structural analytical tools in order to achieve a ...
Sergey Kudryashov   +9 more
doaj   +1 more source

Surface Structure and Electronic Properties of Lu3Al5O12

open access: yesCrystals, 2021
Lu3Al5O12 (LuAG) is a famous scintillator that has the advantages of high efficiency, high light yield, and fast decay after being doped with active ions. F centers (oxygen vacancies with two electrons) and antisite defects are the most important defects
Weian Guo   +3 more
doaj   +1 more source

Resistivity of Surface Steps in Bulk-Insulating Topological Insulators

open access: yesFrontiers in Materials, 2022
Electron transport in topological insulators usually involves both topologically protected surface states and trivial electronic states in the bulk material.
Wonhee Ko   +7 more
doaj   +1 more source

Dopants and Impurity-Induced Defects in ZnO [PDF]

open access: yes, 2020
In recent years, there has been resurgent interest in ZnO due to its efficient UV emission and potential application in opto-electronic devices. The problem of self-compensating defects, especially those related to acceptor-like dopants, remains a major ...
Ton-That, C   +5 more
core   +1 more source

Topological defects and SUSY RG flow

open access: yesJournal of High Energy Physics, 2021
We study the effect of bulk perturbations of N=(2) superconformal minimal models on topological defects. In particular, symmetries and more general topological defects which survive the flow to the IR are identified.
I. Brunner, I. Mayer, C. Schmidt-Colinet
doaj   +1 more source

Probing the effects of SHI and doping induced defects in nanocrystalline spinel ferrites

open access: yes, 2005
Different types of defects have been introduced in ferrite thin films and bulk (powder) systems by implementing different methods namely swift heavy ion irradiation, impurity doping.and mechanical milling. Swift heavy ions (190 MeV Au ions and 150 MeV Ni
Gupta, Ajay (author)   +7 more
core   +1 more source

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