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Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
A path integral Monte Carlo investigation of the role of defects in ordered 4He systems has been conducted. We find that interstitial defects in two- and three-dimensional solid 4He can lead to a small but non-zero superfluid fraction, ...
High magnetic fields are used to kill superconductivity and probe what happens to system when it cannot reach the ideal ground state, i.e. what is the normal-state ground state? Early work in High-Tc, where the application of magnetic...
In this dissertation, the use of on-chip superconducting (SC) resonators as a probe of spin-photon interactions as well as other superconducting phenomena will be presented. In particular, coherent Rabi oscillations are demonstrated for...
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...
An experimental examination of low-lying proton resonances in 26Si was conducted using the proton transfer reaction, d(25Al, 26Si)n. This reaction is analogous to the direct single proton capture, 25Al(p, g)26Si, of astrophysical...
This dissertation presents work on demonstrating the feasibility of micro-Hall sensors for the detection of specific bimolecular interactions using micrometer and nanometer sized superparamagnetic beads. The first part of this...
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...
Three doping studies on Kondo lattices are investigated in this thesis: FeSi1-xGex, Ce1-xLaxCoIn5, and Yb1-xYxInCu4. For FeSi1-xGex, we constructed the phase diagram through the analysis of magnetic, thermal and transport measurements on...
This dissertation presents research done on utilizing the ferromagnetic semiconductor europium sulfide (EuS) to inject spin polarized electrons into the non-magnetic semiconductor indium arsenide (InAs). There is great interest in...
This dissertation presents a systematic study of superconductivity and superconducting quantum phase transitions in ultrathin homogeneous Pb films. We have explored the superconductor to insulator quantum phase transitions (SITs) down to...
We developed an on-chip SQUID (Superconducting Quantum Interference Device) measurement technique to study spin dynamics in Single Molecular Magnets (SMMs) and other spin systems. SMMs systems are thought as potential qubit candidates, ...
We treat two different problems in condensed matter physics. The rst concerns nuclear magnetic resonance (NMR) in optimally-doped YBCO in the mixed state. We show that the line shape is broadened due to the fact that the Knight shift...
Direct observation and understanding of atomic-level structural dynamics are important frontiers in scientific research and applications. Femtosecond electron diffraction (FED), a technique that combines time-resolved pump-probe and...
We have studied different aspects of magnetic materials in bulk, nanoparticles, and thinfilm form with emphasis on their use in biomedical and technological applications. In this work: 1. We have synthesized several new Gd based...
This dissertation presents the search for the standard model Higgs boson and initial measurement of its properties using the Compact Muon Solenoid experiment at the Large Hadron Collider. The Higgs boson is the last predicted particle of...
This thesis presents the new development of the 3rd generation femtosecond diffractometer (FED) in Professor Jim Cao's group and its application to study ultrafast structural dynamics of solid state materials. The 3rd generation FED...
We have developed a method for rapid, massively-parallel assembly and alignment of single walled carbon nanotubes (SWCNT) on a solid-state substrate. The results opened the possibility of production of SWCNT-based integrated circuits. In...
This dissertation investigates the entanglement properties of extended quantum systems which exhibit either long-range order or quantum criticality. While we mainly focus on the von Neumann entanglement entropy, the mutual information is...
This dissertation describes spin injection, transport, and detection experiments from Fe electrodes into a bulk AlGaAs channel. This semiconducting alloy is one of a class of persistent photoconductors, chosen as the spin transport...
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