Browsing by Subject "Condensed matter physics"
Now showing items 120 of 25

AC Measurements of GrapheneSuperconductor Devices
(2022)The field of quantum transport studies electron motion at low temperatures in nanostructures. Exciting electron phenomenon can be engineered by combining device designs like quantum dots, Josephson junctions, and interferometers ... 
An experimental study of the jamming phase diagram for twodimensional granular materials.
(2020)What affects the transition of a collection of grains from flowing to a rigid packing? Previous efforts towards answering this important question have led to various versions of ``jamming’’ phase diagrams, which specify ... 
Crystal Symmetry Algorithms in a HighThroughput Framework for Materials Research
(2013)The highthroughput framework AFLOW that has been developed and used successfully over the last decade is improved to include fullyintegrated software for crystallographic symmetry characterization. The standards used in ... 
Dynamics of Open Quantum Systems: Measurement, Entanglement, and Criticality
(2020)Open quantum systems refer to quantum systems that couple with their surrounding environment. They are ubiquitous, especially for quantum devices. Due to coupling with the external environment, the dynamics of open quantum ... 
Electron Transport through Carbon Nanotube Quantum Dots in A Dissipative Environment
(2012)The role of the surroundings, or <italic> environment </italic>, is essential in understanding funda mental quantummechanical concepts, such as quantum measurement and quantum entanglement. It is thought that a dissipative ... 
Electronic and Spin Correlations in Asymmetric Quantum Point Contacts
(2014)A quantum point contact (QPC) is a quasione dimensional electron system, for which the conductance is quantized in unit of $2e^2/h$. This conductance quantization can be explained in a simple single particle picture, where ... 
Fermion Bag Approach for Hamiltonian Lattice Field Theories
(2018)Understanding the critical behavior near quantum critical points for strongly correlated quantum manybody systems remains intractable for the vast majority of scenarios. Challenges involve determining if a quantum phase ... 
GaAsBi Synthesis: From Band Structure Modification to Nanostructure Formation
(2017)Research and development bismides have proven bismides to be a promising field for material science with important applications in optoelectronics. However, the development of a complete description of the electrical and ... 
Granular Impact Dynamics: Grain Scale to Macroscale
(2014)Granular impact, where a foreign object strikes a granular material like sand, is common in nature and industry. Due to experimental difficulties in obtaining sufficiently fast data at the scale of a single grain, a description ... 
Interacting Photons in WaveguideQED and Applications in Quantum Information Processing
(2013)Strong coupling between light and matter has been demonstrated both in classicalcavity quantum electrodynamics (QED) systems and in more recent circuitQEDexperiments. This enables the generation of strong nonlinear photonphoton ... 
Investigating the Ground States of Triangular Antiferromagnet Quantum Spin Liquid Candidates
(2021)The pursuit of the quantum spin liquid (QSL) state has been at the fore of condensed matter physics for several decades. In this exotic state of matter, spins remain dynamic in the zero temperature limit while retaining ... 
Novel Tensor Network Methods for Interacting Quantum Matter and Its Dynamical Response
(2020)The simulation of interacting quantum matter remains challenging. The Hilbert space dimension required to describe the physics grows exponentially with the system size, yet many interesting collective phenomena emerge only ... 
Out of Equilibrium Superconducting States in Graphene Multiterminal Josephson Junctions
(2022)Multiterminal Josephson junctions have attracted attention, driven by the promise that they may host synthetic topological phase of matter and provide insight into Floquet states. Indeed, the added complexity of ... 
Physics of Hexagonal LimitPeriodic Phases: Thermodynamics, Formation and Vibrational Modes
(2016)Limitperiodic (LP) structures exhibit a type of nonperiodic order yet to be found in a natural material. A recent result in tiling theory, however, has shown that LP order can spontaneously emerge in a twodimensional (2D) ... 
Pullout Experiment in Granular Material
(2018)Twodimensional impact experiments by Clark et al. identified the source of inertial drag to be caused by ‘collisions’ with a latent force network, leading to large fluctuations of the force experienced by the impactor. ... 
Quantum Critical Phenomena of Relativistic Fermions in 1+1d and 2+1d
(2022)In this dissertation, we study the phase structures and the quantum critical phenomena of relativistic lattice fermions with $\O(2N_f)$ symmetry in one and two spatial dimensions, motivated by the ability to perform efficient ... 
Shape Effects on Jamming of Granular Materials
(2012)In this work, we have focused on the jamming properties of systems composed of semi2D elliptical shaped particles. In order to study these systems, we have performed three types of experiments: Couette shear, biaxial isotropic ... 
Soft Selfassembly and Densest Packings in Colloidal Models
(2017)Inspired by the beauty of various materials with distinct structures and functions in nature, researchers have been dedicating themselves to discover new ways of creating functional artificial materials to fulfill ... 
Superconducting Electron Transport in GrapheneBased Josephson Junctions
(2017)Graphene – a single atomic layer of graphite – is one of the most studied quasi twodimensional materials (2D). Its electronic properties are particularly interesting, for example allowing one to study the physics of 2D ... 
The Effects of Lattice Anharmonicity on Phase Transitions and Thermal Conductivity Through Phonon Measurements in Energy Materials
(2021)Advances in neutron scattering instrumentation and firstprinciples calculations (due to increasing computational power) now allow for detailed studies of phonon anharmonicity, even in relatively complex systems. The work ...