Search results for "Localized States"

showing 3 items of 3 documents

High‐nuclearity mixed‐valence magnetic clusters : A general solution of the double exchange problem

1996

We report here a general solution of the double‐exchange problem in the high‐nuclearity mixed valence systems containing arbitrary number P of the electrons delocalized over the network of N (P<N) localized spins. The developed approach is based on the successive (chainlike) spin‐coupling scheme and takes full advantage from the quantum angular momentum theory. In the framework of this approach the closed‐form analytical expressions are deduced for the matrix elements of the double exchange interaction, two‐electron transfer, and three‐center interaction that can be referred to as the potential exchange transfer. For the arbitrary nuclearity mixed‐valence systems the matrix elements of all …

Angular momentumValence (chemistry)SpinsChemistryExchange interactionExchange InteractionsGeneral Physics and AstronomyElectron TransferQuantum numberLocalized StatesUNESCO::FÍSICA::Química físicaDelocalized electronMolecular ClustersQuantum mechanicsMixed−Valence CompoundsPhysical and Theoretical ChemistryMatrix ElementsSpin−Lattice Relaxation:FÍSICA::Química física [UNESCO]Exchange Interactions ; Molecular Clusters ; Matrix Elements ; Electron Transfer ; Localized States ; Spin−Lattice Relaxation ; Mixed−Valence CompoundsQuantumBasis set
researchProduct

Photoelectric response of localized states in silica glass

2019

This work was supported by the Latvian Science Council Grant No lzp-2018/1-0289.

Materials sciencePhotoconductivityFOS: Physical sciencesApplied Physics (physics.app-ph)02 engineering and technologyElectronLocalized states01 natural sciencesElectric fieldDember effect0103 physical sciences:NATURAL SCIENCES:Physics [Research Subject Categories]Materials ChemistrySpace charge limited current010302 applied physicsCondensed Matter - Materials ScienceMaterials Science (cond-mat.mtrl-sci)SilicaPhysics - Applied PhysicsPhotoelectric effect021001 nanoscience & nanotechnologyCondensed Matter PhysicsPenning trapSpace chargeElectronic Optical and Magnetic MaterialsPhotoexcitationDember effectCeramics and CompositesCharge carrierAtomic physics0210 nano-technologyJournal of Non-Crystalline Solids
researchProduct

Luminescence of localized states in oxidized and fluorinated silica glass

2019

This work was supported by the Latvian Science Council Grant No lzp-2018/1-0289.

Materials sciencePhotoluminescenceRecombination luminescenceTime resolved photoluminescencePhysics::OpticsFOS: Physical sciences02 engineering and technologyLocalized statesPhotochemistryExcimer01 natural sciencesCondensed Matter::Disordered Systems and Neural Networkslaw.inventionlaw0103 physical sciencesMaterials Chemistry:NATURAL SCIENCES:Physics [Research Subject Categories]Pure silica glass010302 applied physicsCondensed Matter - Materials ScienceSelf-trapped holeMaterials Science (cond-mat.mtrl-sci)021001 nanoscience & nanotechnologyCondensed Matter PhysicsLaserElectronic Optical and Magnetic MaterialsAtomic electron transitionAttenuation coefficientCeramics and CompositesCharge carrier0210 nano-technologyLuminescenceExcitationOxygen deficient centersExcimer lasers
researchProduct