Browsing Auburn Theses and Dissertations by Department "Physics"
Now showing items 21-40 of 101
Electron Correlation in the Two-Color Photoionization and Laser Dissociation of H2+
(2018-06-05)
We have constructed, to our knowledge, a first of its kind two-color pulsed synchrotron
(XUV) and strong field laser (IR) COld Target Recoil Ion Momentum Spectroscopy (COLTRIMS)
experiment. We describe the design, ...
Electron dynamics in inner-shell photo-ionization, dielectronic recombination and electron impact excitation
(2016-08-05)
This dissertation includes three main topics: Dynamics of outgoing inner shell photoionized electrons
and Auger decay electrons,
an investigation into the recently proposed mechanism of
below threshold dielectronic ...
Electronic characterization of technologically relevant interfaces on beta Gallium Oxide and 4H-SiC wide bandgap semiconductors
(2018-04-17)
Conventional silicon power device technologies are rapidly approaching their performance
limits in power devices. Therefore, exploration of novel materials for next-generation power
electronics is necessary. In this ...
Equilibrium Calculation with Toroidal Flow in NIMEQ
(2018-07-19)
The focus of this work is to demonstrate the importance of incorporating toroidal rotation in calculating tokamak-like equilibria with axisymmetry. Specifically, this work will focus on showing the impact toroidal flow had ...
Equilibrium Molecular Dynamics Study of Phonon Transport Properties at High Temperatures
(2023-12-06)
Thermal conductivity is a material property of great importance in many areas of physics including coat barriers, renewable energy, nano-electronic devices, and geological processes inside the Earth. At the microscopic ...
Evolution of the Earth's Ring Current during Geomagnetic Storms
(2012-08-29)
We examine the evolution of the ring current during the main and early recovery phases of five geomagnetic storms, three driven by co-rotating interaction regions (CIRs) in the solar wind and two driven by interplanetary ...
Fabrication and characterization of AlGaN/GaN High Electron Mobility Transistor
(2015-05-05)
As primary material for semiconductor fabrication field, Gallium nitride has attracted lots of interest of scientists and developers due to its unique and exceptional electrical properties such as high thermal conductivity, ...
Fabrication and Characterization of Gallium Nitride Based Diodes
(2011-05-06)
This dissertation describes research to the fabrication and characterization of Gallium nitride (GaN) based diodes. GaN is considered to be probably one of the most significant semiconductor material ever discovered ...
Fabrication and Characterization of High Temperature P-channel 4H-SiC MOSFETs
(2022-10-18)
Power devices are of paramount relevance with the emergence of greener technology to utilize renewable energy sources. Conventional Si devices are reaching their performance limit due to Silicon’s physical limitation of ...
Fabrication and Characterization of Thin Film Transistors based on Sol-Gel Derived Zinc Oxide Channel Layers
(2018-04-30)
This dissertation aims to explore film and device characteristics of zinc oxide (ZnO) based channel layers fabricated via the sol-gel spin-coating growth technique. ZnO is wide band gap semiconductor with a wide range of ...
Fabrication and Characterization of ZnO and GaN Devices for Electronic and Photonic Applications
(2013-12-04)
The research work presented in this dissertation is based on two direct and wide band gap semiconductors: ZnO and GaN. On the first part of the dissertation, the synthesis of ZnO nanorod array via the low temperature ...
Fabrication and Electrical/Optical Characterization of Bulk GaN-based Schottky Diodes
(2009-08-05)
As a wide bandgap semiconductor material, Gallium Nitride has long been
considered as promising in blue and UV Light Emitting Diodes. And recently, its great
potential in high power and high temperature applications is ...
Fabrication of AlGaN/GaN MESFET And It’s Applications in Biosensing
(2010-09-29)
Gallium Nitride has been researched extensively for the past three decades for its application
in Light Emitting Diodes (LED’s), power devices and UV photodetectors. With the recent
developments in crystal growth ...
Factors Governing Tin Whisker Growth
(2012-08-02)
Tin (Sn) whiskers are electrically conductive, single crystal eruptions that can grow from surfaces where tin is deposited on a substrate surface. They present reliability problems for the electronics industry due to the ...
Field Aligned Currents Derived from Pressue Profiles Obtained from TWINS ENA Images
(2017-08-21)
Field aligned currents (FACs) are an important mechanism coupling the Earth's magnetosphere and ionosphere. The Two Wide-Angle Imaging Neutral-atom Spectrometers (TWINS) mission is the first stereoscopic neutral atom ...
Filament Morphology in Highly Magnetized Capacitively Coupled Low Temperature Plasmas
(2023-08-04)
Due to the small charge-to-mass ratio of dust particles, it is often necessary to use large magnetic fields of B ≥ 1 T, in order to observe the influence of magnetic forces in laboratory dusty plasmas. However, when ...
Filamentation and Formation of Imposed Patterns in Low-Pressure Magnetized Electric Discharges: A Numerical Approach
(2020-08-03)
Presence of strong magnetic fields (B ≥ 1.0 T) in magnetized dusty plasma experiments can result in a variety of phenomena in the background plasma and in the dust cloud. In the background plasma, the magnetic field induces ...
First-principles Theoretical Study of Lattice Thermal Conductivity of Crystals and Earth Minerals at High Temperatures and Pressures
(2013-03-20)
The focus of this dissertation is the first-principles calculation of lattice thermal
conductivity, a non-equilibrium thermal transport property, for a wide range of solid
materials including both ideal crystals and iron ...
Gallium nitride based heterojunction field effect transistor: fabrication and application
(2012-06-19)
Gallium nitride (GaN) is a wide bandgap semiconducting material, which is piezoelectric, biocompatible, and also resistive to ionizing radiation. Material properties such as direct bandgap, chemical/thermal stability, ...
Global Hybrid Simulation of Kinetic Alfven Waves Associated with Magnetotail Reconnection and Fast Flows
(2020-05-18)
It is believed Alfven waves, and particularly kinetic Alfven waves (KAWs), play an important role in the coupling between the solar wind and the magnetosphere. Although KAWs have been observed in the magnetotail and ...