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 7 of 7 for “"nonlocal effects"”.
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Efficient perturbative framework for coupling of radiative and guided modes in nearly periodic surfaces
… is especially relevant to the exploitation of nonlocal effects in large-area metasurfaces. Our framework bridges a gap in the theory of slowly varying surfaces: aside from brute-force numerical simulations, current approximate methods can model either guided or radiative waves, but cannot …
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Near-field radiation in nanoscale gaps
… small gaps will saturate due to the influence of nonlocal effects on the dielectric constant. Previous experiments using an AFM bi-layer cantilever reported near-field radiation heat transfer between a silica sphere and a flat plate down to a 30 nm gap. The objective of this thesis is to …
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Topics in theory of superconductivity
… superconductivity. In the first part a theory of nonlocal electrodynamics of unconventional superconductors is developed and applied to calculate the magnetic penetration depth in the Meissner state for a simple d-wave model of the cuprate high temperature superconductors. We find that in the …
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Particle-In-cell simulations of nonlocal and nonlinear effects in inductively coupled plasmas
The kinetic effects in an inductively coupled plasma (ICP) due to thermal motion of particles modified by self-consistent magnetic fields are studied by using a particle-in-cell (PIC) simulation. In the low pressure, low frequency regime, electron mean free paths are large relative to device size …
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Model calculations of current and density distributions in dissipative Hall bars
… model, that includes nonlinear screening effects on the conductivity via the self-consistently calculated density profile. The existence of "incompressible strips" with integer Landau level filling factor is investigated within a Hartree-type approximation, and nonlocal effects on the …
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Multiscale Peridynamics Analysis of Nanocomposites and Energetic Materials Using Nonlocal and Local Interface Models
… macroscale material. This work focuses on the effects of different interface models in nanocomposites composed of carbon nanotubes in polymer matrix materials and their applications as nanocomposite binders in energetic materials. These material systems include materials that span multiple …
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Theoretical and Computational Aspects of the Optimized Effective Potential Approach within Density Functional Theory
… number of electrons, and the ability to model nonlocal effects. Functionals depending explicitly upon occupied and unoccupied Kohn–Sham orbitals are considered necessary to address these and other issues. This dissertation considers certain issues relevant to the successful implementation of …