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Controlled growth of the aromatic p-phenylene oligomer molecules of p-4P, p-5P, and p-6P adsorbed onto individual KBr(001), KCl(001), NaCl(001), and NaF(001) substrates, has been investigated primarily by x-ray diffraction (XRD) and to a...
A search for new physics with a three photon final state has been performed using data from the Compact Muon Solenoid detector at the Large Hadron Collider. The integrated luminosity was 12.3 fb⁻¹ recorded in 2012 at centre-of-mass...
A study has been carried out on F-actin self-assembly to address various questions regarding the mechanisms for assembly and the properties of the assembled system. We are interested in two Factin self-assembly mechanisms, counter-ion...
A new angular correlation analysis technique for assigning spins to alpha-unbound states of nuclei that feed alpha-unbound states of other nuclei is described. A kinematically complete experiment was performed to study the reaction ¹²C...
Electrophoresis as an analytical technique has made considerable contributions to the separations and analysis of macromolecules in biology-related research. Pluronic gels, which are composed of orderly packed spherical micelles...
Galaxy clusters are the largest gravitationally bound structures in the Universe, and they provide valuable insights into astrophysics and cosmology. One method of studying galaxy clusters - the Sunyaev-Zel'dovich Effect - involves using...
This thesis investigates a new family of Pd based transition metal chalcogenides which displays unconventional superconducting behavior and also the newly discovered Weyl physics in transition metal monopnictides. The superconductors...
Electron paramagnetic resonance (EPR) spectroscopy is a powerful tool to elucidate the structure and dynamics of membrane proteins and protein-lipid interactions. High magnetic fields increase EPR sensitivity and broaden its practice...
Observation of Gap-like Features in Superconductors and Heavy Fermions via Quasiparticle Scattering and Tunneling Spectroscopies, and Electronic Transport
Electron spectroscopies are powerful tools to reveal Fermi surface gapping in intermetallic systems. In particular, planar tunneling spectroscopy (PTS) and quasiparticle scattering spectroscopy (QPS, also known as point-contact...
We introduce a new framework, NLOX, in which one-loop QCD and electroweak corrections to Standard Model processes can be automatically calculated. Within this framework, we calculate the first order of electroweak corrections to the...
At the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson National Laboratory (JLab), $\omega$ vector-mesons were photo-produced off a fixed, liquid-hydrogen target during the 2009 run-period via the reaction $\gamma p ...
The study of nuclear structure at very high angular momentum requires sensitive detector systems in order to detect weak signals. Large gamma-ray arrays were used in this thesis to study the high-spin states in 166;168;170Ta and 160Yb....
Electrical properties (EP), namely conductivity and permittivity, can provide endogenous (having an internal origin) contrast for tissue characterization. EP of the biological tissue are strongly related to essential determinants of the...
The frontier of the rapidly emerging field of nano-optoelectronics relies on the understanding and control of intersubband transitions in low-dimensional systems. The continual search for new optoelectronics concepts and materials ...
Liquid crystal phases exhibit physical characteristics that lie between those of liquid and crystal phases. The many liquid crystal sub-phases are defined based on the degree of positional and orientational ordering the molecules have...
Dendritic spines are small protrusions from dendrites on which the majority of excitatory synapses occur (Gray, 1959; Peters et al., 1976; Harris and Kater, 1994). Dendritic spines serve to compartmentalize second messenger systems (Koch...
Massive stars play a crucial role in the universe. Yet, our understanding of massive stars remains incomplete due to their rarity, short lifetimes, complexity of binary interactions, and imprecise Galactic distances. An important...
Proteins are flexible and dynamic. One static structure alone does not often completely explain biological functions of the protein, and some proteins do not even have high resolution structures. In order to provide better understanding...
We present results of a search for single top quark production in pp collisions using a dataset of approximately 1 fb−1 collected with the DØ detector. This analysis considers the muon+jets and electron+jets final states and makes use of...
High-purity niobium is the material of choice for making superconducting radio-frequency cavities for the modern particle accelerator. While making the cavities from the Nb sheet, it goes through a series of processes including chemical...
Nanotechnology is a frontier area of scientific research that involves materials and devices with at least one dimension at or below 100 nm scale. The ability to rationally synthesize and characterize functional materials at the...
CeIn3 belongs to a class of strongly correlated f-electron compounds that show a variety of unusual features like heavy fermion, itinerant and localized antiferromagnetism, non-Fermi liquid behavior and unconventional superconductivity....
This dissertation presents systematic studies on ordered states of organic conductors investigated mainly by Electron Spin Resonance (ESR). First, we describe an introduction to organic conductors. Organic conductors are based on...
Quantum computing gives novel way of computing using quantum mechanics, which furthers human knowledge and has exciting applications. Quantum systems with diluted spins such as rare earth ions hosted in single crystal, molecule-based...
Semiconductor spintronics is widely regarded as a viable pathway to overcome many of the physical limitations of the present micro-electronics technology. Electrical spin injection into a semiconductor, coherent transport and...
Wavelength tunability or bandgap tuning of mixed halide perovskite, CsPb(IxBry)3 (y=1-x), can be achieved by changing the composition of iodide and bromide ions but under continuous illumination the photoluminescence (PL) peak position...
Several models for materials of much current interest in condensed matter physics have been numerically studied, using unbiased methods, including Monte Carlo simulations and exact treatment of the fermionic trace at finite temperature....
Baryon and hybrid baryon wave functions were built from harmonic oscillator basis states with explicit flavor and color. The Relativized Constituent Quark Model was extended to calculate more baryon states. Improvements were made to the...
Metal-insulator transitions (MITs) remain one of the unresolved science problems of condensed-matter physics, which are rather general and of fundamental importance. In the vicinity of the MITs, the behavior is found to be unconventional...
Electrostatic interactions play an important role in many aspects of the structural and functional properties of biomolecules because of their long-range behavior. The nonlinear Poisson-Boltzmann equation (NLPBE) theory has long been...
Separations were performed on double stranded DNA (dsDNA) using electrophoresis. Electrophoresis is the steady transport of particles under the influence of an external electric field. Double stranded DNA fragments ranging in length from...
Understanding properties of quasiparticles in novel two-dimensional (2D) semiconductors, such as atomically thin transition metal dichalcogenides (TMDCs) and group-III metal monochalcogenides, is among the most interesting topics in...
We perform an analysis dedicated to the search for new and unusual strangeonium states produced in the reaction γp → pφη. The data used for this analysis was recorded during the Spring 2017 physics run for Hall D of Thomas Jefferson...
In transition metal oxides, such as A2B2O7, the B-site cations typically govern many of the fundamentally and technologically interesting properties. The cubic pyrochlore oxides, A2B2O7, have attracted much attention over the past 20...
The evolution of material structures is governed by the making and breaking of chemical bonds and the rearrangement of atoms, which occurs on the time scale of an atomic vibrational period, hundreds of femtoseconds. Atomic motion on this...
One of the remaining puzzles in particle physics is the origin of electroweak symmetry breaking. In the Standard Model (SM), a single doublet of complex scalar fields is responsible for breaking the SU(2)L × U(1)Y gauge symmetry, thus...
Multi-strange baryons have played an important role in understanding the strong interaction. Despite their importance to advancing quantum chromodynamics (QCD), little is known about such hyperons due to the lack of a strange probe....
The integration of soft (organic, biological) and hard (semiconducting, metallic) materials is of central importance in a host of emerging areas in materials research and nanoscience. Micro- and nano-scale hybrid soft/hard condensed...
In this dissertation we explore three topics: 1) the extraction of the proton radius from electron scattering data; 2) the reconstruction of neutron distributions in nuclei from parity violating experiments; and 3) the propagation of...
At low temperature (T) and weak magnetic field (B), two dimensional electron systems (2DES) can exhibit strong 1/B-periodic resistance oscillations on application of sufficiently strong microwave radiation. These oscillations are known...
The properties of quantum spins diluted in non-magnetic crystals make them a promising candidatefor a quantum memory given their long coherence and relaxation times and their limited Hilbert space span by the electron and nuclear states...
Strong electron-electron correlations in physical systems can lead to phenomena that are not trivial composition of constituent parts, that the collective behavior lead to emergence of exotic phases and behaviors. To describe exotic...
The subject of this doctoral dissertation is to study the equations of state of nuclear and neutron-star matter. We tackle this problem by employing several models of the relativistic effective interactions. The relativistic effective...
In this study three projects are described that investigate the transport properties of the ferromagnetic semiconductor, EuS, as well as devices based on the half metal, CrO2. These materials are expected to be highly spin-polarized...
The following presents the details of the study of a class of materials known as cuprate superconductors, primarily by measurement of their specific heat capacities, across two materials at very low temperatures and in very high values...
We studied H-shell flashes on CO WDs accreting Hydrogen rich matter in regimes where they are believed to be on the border of stable accretion and of having dynamical mass loss. These systems are believed to be progenitors of SNe Ia, ...
Electron paramagnetic resonance (EPR) spectroscopy is a powerful technique to study biomolecules. EPR has been employed to investigate the structure and dynamics of biological membranes, membrane proteins, and protein-lipid interactions....
This dissertation represents a set of work in the field of semiconductor spintronics. We address an important issue in this field that involves spin injection efficiency in spintronics devices from a ferromagnet into a non-magnetic...
This thesis is mainly focus on the 3D topological semimetal and 2D materials. If you ask a physicist to name the most significant discovery in solid-state physics over the recent 50 years, and highly likely, if not high-temperature...
This dissertation examines the theoretical and computational methods needed to calcu- late opto-electronic multiple-carrier excitation rates in strongly correlated insulators (SCI). Through several studies, we find that we are able to...
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