Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"correlated disorder"”.
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Anderson Localization in Low-Dimensional Systems with Long-Range Correlated Disorder
… has been known for over a half century that when disorder is introduced into a crystalline system through impurities, vacancies, grain boundaries, or other mechanisms that break the translational invariance of the system, the electronic eigenstates will localize in space. This phenomenon is called …
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Anderson Localization in Two-Channel Wires with Correlated Disorder: DNA as an Application
… of electrons in two-channel wires with correlated disorder and in DNA molecules. It involved an analytical calculation part where the formula for the inverse localization length for electron states in a two-channel wire is derived. It also involved a computational part where the …
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Characterization of wave transport in non-conservative media with random and correlated disorder
<p>"Passive quasi-one-dimensional random media exhibit one of the three regimes of transport - ballistic, diffusive, or Anderson localization - depending on system size. The ballistic and diffusion approximations assumes particle transport, whereas Anderson Localization occurs when wave …
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Analytical and numerical studies of photo-injected charge transport in molecularly-doped polymers
… that has been shown to arise from the correlated Gaussian energy distribution of transport sites encountered by charges undergoing hopping transport through the material. Analytical and numerical studies of photo-injected charge transport in these materials are presented here with an …
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A Case Study of Complex Metallic Alloy Phases: Structure and Disorder Phenomena of Mg-Pd Compounds
… with more than hundred atoms, (ii) inherent disorder, (iii) the presence of a cluster substructure. Phase fields and heterogeneous equilibria of the intermediate phases β- Mg6Pd, γ-Mg57Pd13, δ-Mg56.4Pd13.6, ε-Mg306Pd77, ζ-Mg64Pd17, η-Mg3Pd, θ-Mg5Pd2, ι- Mg2Pd and κ-MgPd were determined. The …
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Coherent Transport of Matter Waves in Disordered Optical Potentials
… to load them into regular optical lattices or disordered optical potentials, has evoked new interest for the disorder-induced localization of ultra-cold atoms. This work studies the transport properties of matter waves in disordered optical potentials, which are also known as speckle …
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Study of artificially disordered optical fibers
… multi-mode fibers (MMF) with controlled volume disorder is investigated. Experiment shows that a segment of disordered MMF as short as 10 cm is sufficient to distribute power uniformly over all co-propagating modes and the intensity at the output surface of the fiber follows the Rayleigh …
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Localization and spreading of matter waves in disordered potentials
… relevant problems of the physics of quantum disordered systems from a numerical and theoretical point of view, with specific attention to the connection of our findings with ultracold atomic gases experiments. We concentrate on two main issues: the interplay between localization and …
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Nematic liquid crystals for nano-structured organic photovoltaic
… energy is field dependent. The Gaussian disorder model and correlated disorder model were used to analyze the mobility data of four liquid crystals compounds with the same conjugated core and different end groups.We show that the thin film nanoscale morphology and the phase separation of …
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"“Phonon"" and electron transport in glass-crystal dual materials"
Disorder has been a long-standing driver across all sectors of materials engineering, ranging from energy and transportation, to electronics and communications, and to biomedicine and environment. Disorder engineering has focused primarily on tuning its spatial configuration and distribution to …
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Avalanches in disordered systems
… avalanching models with quenched disorder to three different sys- tems. The first system is the neuronal network in in vitro rat cortex; neurons generate electrical impulses that travel along axons and dendrites to potentiall influence the behavior of other neurons. The second sys- …