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 20 of 96 for “"electrical transport"”.
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Electrical transport and superconductivity in doped quantum critical ferroelectrics
This thesis (Electrical transport and superconductivity in doped quantum critical ferroelectrics) presents the results of research into the electrical transport and superconductivity found in the neighbourhood of quantum phase transitions in carrier-doped ferroelectrics and paraelectrics. The …
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Electrical transport properties of barium titanate-based capacitor ceramics
Electrical conduction mechanisms in BaTiO₃-based ferroelectric capacitor ceramics with an emphasis on the X7R type were studied. Dominant charge carriers in this material were identified as conduction band electrons below a temperature of 850°C. This was substantiated by the following results: …
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Computing and the electrical transport properties of coupled quantum networks
… In this regime, the wave nature of electron transport under the influence of transverse magnetic fields leads to interesting applications for digital logic and computing circuits. The work specifically looks at characterizing a few main areas that would be of interest to experimentalists who …
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Thermoelectric and electrical transport properties of Bi2Te3 compacted nanoparticles bulk material
… with extremely high mobility. However, their transport properties are typically dominated by bulk carriers that outnumber the surface carriers by orders of magnitude. We herein present a strategy to overcome the problem of bulk carrier domination by using 3D TI nanoparticles, which were …
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The Electrical Transport Study Of Graphene Nanoribbons And 2d Materials Beyond Graphene
<p>The electrical transport measurements on a suspended ultra-low-disorder graphene nanoribbon (GNR) with nearly atomically smooth edges that reveal a high mobility exceeding 3000 cm2 V-1 s-1 and an intrinsic bandgap was reported in this study. The experimentally derived bandgap is in quantitative …
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Influence of ag-doped on magnetic and electrical transport properties in Pr0.75Na0.25MnO3 manganites
… attention among researcher due to their electrical and magnetic properties at lower temperature. However, most of the doping does not totally induce the ferromagnetic-metallic (FMM) state probably due to dopant level. As such, the influence of ion doped on host composition need to be …
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Electrical Transport and Scattering Mechanisms in Thin Silver Films for Thermally Insulating Glazing
… parameter for the infrared reflectance is the electrical conductance of the layer stack - the better the conductance the higher the reflectance. Electrically conductive films of thicknesses smaller than the electron mean free path exhibit a strong increase in the residual resistivity …
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Correlation of Structure and Electrical Transport Properties of Carbon Nanotubes and Bundles in Field -Effect Transistors
… applications thanks to their excellent electrical and thermal transport properties and the quasi one-dimensional nanostructure. However, there are many structural forms of CNTs and each has its own properties. Correlation of structure and electrical transport properties is still …
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Low Temperature Electrical Transport in 2D Layers of Graphene, Graphitic Carbon Nitride, Graphene Oxide and Boron-Nitrogen-Carbon
… work, we have investigated temperature dependent electrical transport properties of carbon based two-dimensional (2D) nanomaterials. Various techniques were employed to synthesize the samples. For instance, high quality large area graphene and boron, nitrogen doped graphene (BNC) were grown using …
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Growth, Characterization and Measurement of Epitaxial Sr2RuO4 Thin Films
… films using pulsed laser deposition and their electrical transport properties are systematically discussed. The deposition and optimization process involved several progressive steps. Specifically, the first focus was on the Sr2RuO4 phase optimization in films grown on lattice-matched …
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New features in the phase diagrams of the cuprate high-Tc superconductors mapped using strong magnetic fields
… superconductors using high magnetic field electrical transport measurements. These discoveries attempt to address two central questions pertaining to how the physics of the cuprate high-Tc superconductors evolve as a function of both temperature and hole-doping. The first question addresses …
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Selective transport properties in nanostructured materials
… We first investigate the thermal and electrical transport properties of rippled graphene structures. Here we focus on the rippled textures formed by topological defects of graphene, namely Stone-Wales defects and graphene nanobuds. By exploring different configuration of Stone-Wales …
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Advancements in Hexagonal Boron Nitride for Thermal Neutron Detection Applications
… fabrication and testing, 2) exploration of the electrical transport properties of h-BN, and 3) probing of the defects and impurities of h-BN. As for any material under development, it is necessary to establish device processing techniques to realize active devices based on h-BN. Advancements in …
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Electrical characterisation of simple a-Si:H and nc-Si devices on paper substrates deposited by hot wire chemical vapour deposition and printing techniques
In this work we report on the electrical transport properties of two classes of silicon: hydrogenated amorphous silicon (a-Si:H) obtained by hot wire chemical vapour deposition (HWCVD), and printed nanocrystalline silicon (nc-Si), both deposited on a flexible, lightweight substrate of 80 g m-2 …
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Structural, electro-magnetic and electrical analysis in monovalent doped Nd0.75Na0.25-xKxMnO3 manganites
… phase and surface morphology as well as electrical transport and magnetic properties. However most of study show inconsistent result regarding to the electrical transport and magnetic properties as well as crystalline phase and morphology study. Thus, further detailed study need to be …
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Structural and electrical characteristics of printed metal nanoparticle networks
The structural and electrical properties of metal nanoparticle (NP) networks and their dependence on the constituent phases have been investigated. Percolation and effective media theories have been used to describe the physical properties of disordered systems, as well as providing a link between …
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Transport studies and phenomenological model for sliding charge-density waves in quasi-one-dimensional conductors
Transport studies examining the dynamics of one-dimensional charge-density wave (CDW) condensates are reported. Results using rf and dc, linear and nonlinear electrical transport techniques have been obtained at temperatures below the CDW transition in the quasi-one-dimensional materials …
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Josephson Junctions and Devices fabricated by Focused Electron Beam Irradiation
… properties of the irradiated material. From electrical transport measurements of individual Josephson junctions it was found that these junctions have a Superconductor/Normal/Superconductor (SNS) nature. Low temperature anneal studies indicate that Josephson junctions with optimum properties …
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Growth, Structural and Electrical Characterization of Topological Dirac Materials
… to surface conduction, thereby yielding charge transport rather than spin transport. On this basis, the aim of my PhD was to explore techniques to grow, characterize, fabricate and measure devices on topological Dirac materials, with the hope to experimentally distinguish the bulk from the …
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FeSb2: a riddle, inside an insulator, wrapped in a metal Electric and magnetic properties of the unconventional insulator iron diantimonide
… anomalous behaviour in both its magnetic and electrical properties. Under the application of high magnetic fields, quantum oscillations in the magnetisation are observed, with an inverse-field periodicity indicating the presence of Landau quantisation. Remarkably, these are shown to emanate …
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