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This dissertation encompasses an optical spectroscopic study of the temperature and magnetic field dependence of two magnetic materials with significant electron-electron correlation: antiferromagnetic MnTiO3 and frustrated spin-dimer...
This dissertation presents a study of rare-earth magnetism using spectroscopic techniques. The features of strong spin-orbit coupling and the presence of hyperfine coupling which lead to coupled electro-nuclear crystal field states are...
This dissertation describes several studies of superconducting phenomena in two dimensions. We have investigated the superconductor-insulator quantum phase transitions (SITs) tuned by several parameters, namely disorder (d), magnetic...
Several organic and inorganic systems of importance for fundamental physics and applications have been studied by magnetotransport, dielectric constant, and Raman spectroscopy techniques. At the beginning of my thesis work, I...
If one could be built, a quantum computer would be capable of storing and manipulating quantum states with sufficient accuracy to carry out computations that no classical computer can do (most notably factoring integers in polynomial...
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 ...
Electrical insulators provide the opportunity to study the effects of magnetic interactions in the absence of conduction electrons. Since about ten years ago, experiments on a few insulating dimerized antiferromagnets have shown a low...
This thesis reports results from the Thomas Jefferson National Accelerator Facility (Jefferson Lab) Hall A experiment E91-011, which measured double-polarization observables in the pion electroproduction reaction from the proton....
Nuclear magnetic resonance (NMR), susceptibility, and magnetic torque measurements were used to investigate the field-dependent properties of the localized magnetic moment in the two chain organic conductor Per2Pt[mnt]2. At 8 K, the...
In this work, we study the phenomenology of direct photon production using theoretical predictions at next-to-leading order with threshold resummation up to next-to-leading- logarithmic accuracy . By analyzing the global data sets of...
Single layer graphene (SLG) is a novel 2D system consisting of a single sheet of carbon atoms arranged in a honeycomb lattice, and exhibits a unique, linear low-energy dispersion. Bilayer graphene (BLG), two sheets stacked together, is...
There are theoretical predictions that chromium dioxide (CrO2) is a half metallic ferromagnet. Accordingly, CrO2 would be expected to be very suitable for spin electronic devices. We started the present work in an attempt to prove (or...
The tremendous interest in using the spin degree of freedom in electronic devices has led to an extensive endeavor to investigate the intrinsic spin polarization of various magnetic materials. The work done here expands upon existing...
It is demonstrated that inflatable structures can provide large amounts of stiffness compared to traditional structures of the same mass. A variety of inflatable structures are investigated theoretically. A pressurized lobed cylindrical...
This dissertation encompasses my major experimental work using nuclear magnetic resonance (NMR) to probe the local magnetism and spin dynamics of two interesting systems in condensed matter: density wave and frustrated spin systems....
One of the primary goals of modern condensed matter physics is to elucidate the nature of the ground state in various electronic systems. Many correlated electron materials, such as high temperature superconductors, geometrically...
This dissertation presents work on improving the sensitivity of Hall magnetometry for single magnetic nanoparticle measurement by miniaturizing the devices down to submicron range. Limiting factors for Hall device performance, including...
In this dissertation, I present a study of a wide range of organic and inorganic materials using radio frequency (rf) measurement methods. The organic samples under study were λ-(BETS )2 GaCl4 and λ-(BETS )2 FeCl4 . In the λ-(BETS )2...
The first, second, and third rank analyzing powers tT10, tT20, tT30, and tT20 as well as cross section angular distributions for 12C(7Li, t/d/p) at 34 MeV were measured. The experimental results gave nonzero values for tT10 and tT30...
SmB6 has a cubic CsCl structure consisting of Boron octahedra at the corners of the cubic structure at the Cl sites and Samarium sitting at the body center at the Cs site. Extensive measurements were carried out on high quality single...
Modern effective-theory techniques are applied to the many-body nuclear problem and frustrated quantum spin chains. A novel approach is proposed for the renormalization of nucleon-nucleon operators in a manner consistent with the...
We study the two-dimensional (2D) t−J model (and its extensions) in order to understand the hole dynamics in the 2D CuO2 plane of the cuprate superconductors. Within the linear spin wave approximation (LSW) of the Hamiltonian and the non...
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