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Items (1-11) out of 11 results

Achieving High Accuracy with Low Cost: Successful Applications of Auxiliary Field Quantum Monte Carlo to Weakly-Bound Molecules and Strongly Correlated Materials

Description:
The accurate evaluation of quantum mechanical properties of molecules and materials becomes more challenging when highly accurate descriptions of electron correlation are required. Different flavors …
Year:
2019
Contributor:
Hao, Hongxia (creator)
Rubenstein, Brenda (Advisor)
Peterson, Andrew (Reader)
Marston, Brad (Reader)
Brown University. Department of Chemistry (sponsor)
Genre:
theses
Subject:
AFQMC
strongly-correlated material
dipole-bound anion
Collection:
Chemistry
Theses and Dissertations
Full Record

Cooper Pair Insulator State Near Superconductor-Insulator Transition Probed by Magnetic Impurity

Description:
Studies of the superconductor-insulator transition (SIT) arose from the investigations of metal-insulator transitions (MIT) in the two dimensional limit. The SIT is a typical example …
Year:
2019
Contributor:
Zhang, Xue (creator)
Valles, James (Advisor)
Marston, Brad (Reader)
Stein, Derek (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Low temperatures
Superconductivity
quantum phase transition
superconductor insulator transition
Collection:
Physics
Theses and Dissertations
Full Record

Interaction between the Andes and the Climate System, and Wave Studies

Description:
We used global climate models to study the interaction between the Andes and the climate system. We found that the errors in the tropical Pacific …
Year:
2023
Contributor:
Xu, Weixuan (creator)
Lee, Jung-Eun (Advisor)
Fox-Kemper, Baylor (Advisor)
Marston, Brad (Reader)
Tsai, Victor (Reader)
McPhaden, Michael (Reader)
Brown University. Department of Earth, Environmental, and Planetary Sciences (sponsor)
Genre:
theses
Subject:
Climate modeling
Pacific Ocean--El Niño Current
Ocean-atmosphere interaction
Atmospheric circulation
Collection:
Earth, Environmental and Planetary Sciences
Theses and Dissertations
Full Record

Interferometry in Topological Quantum Liquids

Description:
Topological phases of matter have recently attracted intense interest. Among topological phases, topological quantum liquids, such as fractional quantum Hall liquids and gapped quantum spin …
Year:
2024
Contributor:
Wei, Zezhu (creator)
Feldman, Dmitri (Advisor)
Li, Jia (Leo) (Reader)
Marston, Brad (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Fractional Quantum Hall Effect
Topological Matter
Fabry-Perot interferometers
Anyons
Interferometry
Quantum Spin Liquid
Collection:
Physics
Theses and Dissertations
Full Record

Large-Deviation Theory Approach to Systems with Orientational Order: Results for Two and Three Dimensional Liquid Crystals

Description:
Problems like describing the extent of order in isotropic liquid crystals, the extend of magnetization in magnetic systems and finding polymer end-to-end distances, can be …
Year:
2023
Contributor:
Mainas, Eleftherios (creator)
Stratt, Richard (Advisor)
Rubenstein, Brenda (Reader)
Marston, Brad (Reader)
Brown University. Department of Chemistry (sponsor)
Genre:
theses
Subject:
Molecular Dynamics Simulation
Liquid crystals
Large deviation theory
Random matrix theory
Orientational order
Collection:
Chemistry
Theses and Dissertations
Full Record

Magnetic and Structural Properties of 5d Osmate Double Perovskites Probed by Nuclear Magnetic Resonance

Description:
The combined effect of electronic correlation and strong spin-orbit-coupling(SOC) can give rise to a variety of exotic quantum phases. Double perovskites provide a simple structure …
Year:
2022
Contributor:
Cong, Rong (creator)
Mitrovic, Vesna (Advisor)
Plumb, Kemp (Reader)
Marston, Brad (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Nuclear magnetic resonance
5d osmate double perovskite
spin-orbit-coupled Mott insulator
quantum materials
condensed matter physics
Collection:
Physics
Theses and Dissertations
Full Record

NMR Study of Materials with Significant Spin-Orbit Coupling and Transparent Oxide Films

Description:
Spin-orbit coupling (SOC) refers to the interaction between the orbital angular momentum and electron spin, which is typically a small perturbation in relative light elements. …
Year:
2017
Contributor:
Liu, Wencong (creator)
Mitrovic, Vesna (Advisor)
Valles, James (Reader)
Marston, Brad (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Nuclear magnetic resonance
Spin-orbit coupling
Transparent oxide films
Mott Insulator
Kondo Insulator
Collection:
Physics
Theses and Dissertations
Full Record

Quantum Magnetic and Electronic Heterojunctions for Ultrasensitive Magnetic Sensing and Novel Electrical Rectification

Description:
Magnetic tunnel junctions (MTJs) based on textured MgO insulating barrier are a class of quantum mechanical devices, increasingly used in technology industries as magnetic memory …
Year:
2018
Contributor:
Wang, Shu (creator)
Xiao, Gang (Advisor)
Zia, Rashid (Reader)
Marston, Brad (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
spintronics
Collection:
Physics
Theses and Dissertations
Full Record

Recursive Auxiliary Field Quantum Monte Carlo: From Simulations in the Canonical Ensemble to Entanglement Measures

Description:
The complicated ways in which electrons interact in many-body systems such as most molecules and materials have long been studied without accounting for the effects …
Year:
2023
Contributor:
Shen, Tong (creator)
Rubenstein, Brenda (Advisor)
Stratt, Richard (Reader)
Marston, Brad (Reader)
Brown University. Department of Chemistry (sponsor)
Genre:
theses
Subject:
Chemistry, Physical and theoretical
condensed matter physics
Collection:
Chemistry
Theses and Dissertations
Full Record

Spin-orbital Fluctuations and Unconventional Quantum Phases in Lacunar Spinels: Insights from Neutron and X-ray Scatterings

Description:
Spin, orbit, and lattice dynamics are coupled in strong spin-orbit coupling systems. The Lacunar spinel, GaTa$_{4}$Se$_{8}$, is a unique Mott insulator that hosts molecular spin-orbit …
Year:
2023
Contributor:
Yang, Tsung-Han (creator)
Plumb, Kemp (Advisor)
Marston, Brad (Reader)
Valles, James (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
condensed matter physics
Collection:
Physics
Theses and Dissertations
Full Record

Uncovering Novel Phases in Complex Magnetic Materials Using Resonant X-ray Scattering

Description:
Materials with strongly interacting electrons exhibit a wide variety of unconventional ordering phenomena that are both fundamentally rich and promising for many potential technological applications. …
Year:
2024
Contributor:
Zager, Benjamin (creator)
Plumb, Kemp (Advisor)
Marston, Brad (Reader)
Weber, Peter (Reader)
Brown University. Department of Physics (sponsor)
Genre:
theses
Subject:
Condensed matter--Magnetic properties
quantum materials
condensed matter physics
X-rays--Scattering
X-ray spectroscopy
Collection:
Physics
Theses and Dissertations
Full Record

Items (1-11) out of 11 results