Physics, Department of
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Search for New Physics in Dijet Angular Distributions in Proton-Proton Collisions at 13 TeV
(2018-11-28)A search for quark contact interactions, extra spatial dimensions, quantum black holes, and dark matter is presented in measurements of dijet angular distributions in proton-proton collisions at a center-of-mass energy of ... -
Dark Matter Freeze-out in a Matter Dominated Universe
(2018-08-09)The universe has evolved through several phases as its various constituents dominated its energy content. Candidate dark matter particles may have undergone freeze-out during any such phase. While the standard freeze-out ... -
Electronic Structure and Transport in Correlated and Complex Materials
(2018-07-11)This dissertation has two parts. The first part provides studies on superconducting systems. The electronic structure and superconducting gaps have been investigated in detail in the multi-orbital iron-based superconducting ... -
Atomic-Scale Scanning Transmission Electron Microscopy and First-Principles Study of Functional Oxides
(2018-08-06)Nanostructured transition-metal oxides have shown fascinating physical properties such as ferroelectricity, ferromagnetism and superconductivity. Most of these remarkable properties stem from the interplay between spin, ... -
Relaxation Times for Chiral Transport Phenomena and Spin Polarization in Strongly Coupled Plasma
(American Physical Society, 2018-09)We compute the dynamical relaxation times for chiral transport phenomena in a strongly coupled regime using the AdS/CFT correspondence. These relaxation times can be a useful proxy for the dynamical timescale for achieving ... -
Visualizing spontaneous DNA dynamics and its role in mismatch recognition by damage repair protein Rad4
(2018-03-06)How DNA-binding proteins search for and identify their target sites buried amid a vast excess of non-target sites remains a central question in biology. This study is aimed at elucidating the mechanism by which DNA damage ... -
Transmission Electron Microscopy Investigation of Ion Intercalation in Vanadium Pentoxide Polymorphs
(2018-01-04)Ever increasing demands for batteries with higher energy densities, faster cycling times, as well as safer and more economical options have motivated scientists to explore better cathodes for existing Lithium ion (Li-ion) ... -
Benchmarking the GW Approximation and Bethe–Salpeter Equation for Groups IB and IIB Atoms and Monoxides
(American Chemical Society, 2017-04-07)Energies from the GW approximation and the Bethe–Salpeter equation (BSE) are benchmarked against the excitation energies of transition-metal (Cu, Zn, Ag, and Cd) single atoms and monoxide anions. We demonstrate that best ... -
Folding Mechanisms of RNA Pseudoknots Unveiled with Laser Temperature-Jump and Global Modeling Approaches
(2017-09-06)The functions of RNA pseudoknots (PKs), which are minimal tertiary structural motifs and an integral part of several ribozymes, are determined by their structure, stability and dynamics. Therefore, it is important to ... -
The Quark-Gluon Plasma in the AdS/CFT Correspondence and Thermal Perturbative QCD
(2017-11-02)In this dissertation, I present my research on different aspects of the quark-gluon plasma (QGP) by using the AdS/CFT correspondence, and thermal perturbative QCD approaches. The effects of external magnetic field on the ... -
Particle Type Dependence in Di-Hadron Correlations for Identified Strange Hadrons in Heavy Ion Collisions
(2017-11-01)Ultra-relativistic heavy-ion collisions provide unique opportunities to investigate nuclear matter under extreme conditions. Jets serve as useful probes of the hot, dense medium, known as the Quark Gluon Plasma (QGP), ... -
A Molecular Dynamics Study of the Thermal Boundary Conductance of Stacked Two-Dimensional Materials
(2017-09-15)New nano-scale electronic devices past the Silicon era based on two-dimensional (2D) materials bear the promise of providing small, better performing devices. However the confined geometries in e.g. transistors, that make ... -
Jet-Track Correlation Studies of the Quark Gluon Plasma
(2017-10-24)The properties of the quark gluon plasma (QGP) are explored using correlations between jets and charged-hadron tracks in lead-lead (PbPb) and proton-proton (pp) collision events at 2.76 and 5.02 TeV recorded with the CMS ... -
Electron Sources and Column Components for Ultrafast Electron Microscopy
(2017-08-25)Ultrafast Electron Microscopy (UEM) is a promising new research instrumentation for the material sciences that is targeted towards improving the combined spatial and temporal resolution of measurement techniques. The ... -
Theory and Phenomenology Beyond the Standard Model and Dark Matter Physics
(2017-07-18)This thesis is dedicated to the study of theories of physics Beyond the Standard Model (BSM), specifically minimal extensions in which the Standard Model (SM) gauge group is extended by a new U(1)’ factor. We study the ... -
Search for Boosted Top-Antitop Quark Resonances in Muon+Jets Events at 13 TeV Proton-Proton Collisions
(2017-07-25)Numerous extensions of the Standard Model (SM) predict the existence of new interactions with enhanced couplings to the top quark. The associated massive new particle described by these theories could be observed as a ... -
Artificially Induced Compound Defects in Cuprate and Iron-Based Superconductors
(2017-04-19)My research has been primarily focused on exploring the limits of the current carrying capacity in commercial (RE)BaCuO coated conductors, and in single crystals of the newly discovered iron-based superconductors. In ... -
Atomic Resolution Characterization of CdTe Interfaces
(2016-09-28)Reduction of a non-radiative recombination at grain boundaries is believed to be the key to improve the efficiency of polycrystalline CdTe-based solar cells. The present study employs bi-crystal interfaces to establish the ... -
Applications of Radio Frequency Resonant Cavities in Ultrafast Electron Microscopy
(2016-10-21)Radio frequency resonant cavities are becoming important components in the emerging field of Ultrafast Electron Microscopy, which aspires to bring Dynamic Transmission Electron Microscopy into the realm of sub-nanometer ... -
Vortex cutting in superconductors.
(American Physical Society, 2016-08-09)Vortex cutting and reconnection is an intriguing and still-unsolved problem central to many areas of classical and quantum physics, including hydrodynamics, astrophysics, and superconductivity. Here, we describe ...
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