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Description:: Necessity is the mother of innovation. In the wake of the pandemic, with no flow of samples and limited fabrication techniques available, necessity demanded a new material platform and adaptable methods to make complex oxide samples worth measuring. The material platform was KTaO3 , the younger successor to the mainstay...
Keyword:: Magnetism, Complex Oxide, KTaO3, Superconductivity, Electrical Transport, and Cryogenic
Subject:: Condensed matter physics
Creator:: Krantz, Patrick Wallace
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 08/23/2023
Date Created:: 2023-01-01
Resource Type:: Dissertation
Alternate Identifier:: etdadmin_upload_1009434 and http://dissertations.umi.com/northwestern:16686

Description:: Liquid 3He is the paradigm system for studying exotic quantum mechanical phenomena observed in nature. The normal state of 3He is a strongly-correlated Fermi liquid with strong ferromagnetic spin fluctuations. However, as we cool 3He down to T = 0K, we find something fascinating and unexpected. This exotic fluid remains...
Keyword:: Superfluidity, Helium 3, Quantized Vortex, Superconductivity, Quantum Mechanics, and Phase Transitions
Subject:: Theoretical physics, Condensed matter physics, and
Creator:: Regan, Robert Charles
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 02/01/2021
Date Created:: 2020-01-01
Resource Type:: Dissertation
Alternate Identifier:: http://dissertations.umi.com/northwestern:15410 and etdadmin_upload_780916

Description:: In his Nobel lecture Herbert Kroemer famously stated that “The interface is the device”. While he made this statement in the context of semiconducting heterostructures, it has proven to be just as relevant for more complex materials, such as the transition metal oxides. In particular, the 2-D conducting gas that...
Keyword:: Strongly Correlated Electrons, Low Temperature Physics, Electrical Anisotropy, Superconductivity, Electrical Transport, and Complex Oxides
Subject:: Applied Physics
Creator:: Samuel K. Davis
Owner:: Scholarly Digital Publishing
Date Uploaded:: 01/16/2019
Date Modified:: 01/16/2019
Date Created:: 2017-01-01
Resource Type:: Dissertation

Description:: This dissertation presents a Nuclear Magnetic Resonance (NMR) study of a novel anisotropic superconductor, HgBa$_{2}$CuO$_{4+\delta}$ (Hg1201) and unconventional strain dependence of the mean free path of silica aerogel. Hg1201 is one of the most structurally simple cuprates known. Therefore, it is an ideal compound in investigation of various phases in...
Keyword:: Cuprates, Hg1201, NMR, Diffusion, Aerogel, and Superconductivity
Subject:: Physics and Astronomy
Creator:: Jeongseop A. Lee
Owner:: Scholarly Digital Publishing
Date Uploaded:: 03/22/2018
Date Modified:: 03/22/2018
Date Created:: 2017-01-01
Resource Type:: Dissertation

Description:: The behavior of type-II superconductors is modeled using the time-dependent Ginzburg Landau equations (TDGLE). Pinning centers (inclusions) and geometries which maximize the critical current that can be passed through a superconductor are numerically obtained. Previous analytical results are summarized and new results are obtained for the critical current in one...
Keyword:: Phase Slips, Magnetic Vortices, Dynamical Systems, Optimization, and Superconductivity
Subject:: Engineering Sciences and Applied Mathematics
Creator:: Gregory Jonathan Kimmel
Owner:: Scholarly Digital Publishing
Date Uploaded:: 02/12/2018
Date Modified:: 02/13/2018
Date Created:: 2016-01-01
Resource Type:: Dissertation

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