Imaging the response of mesoscopic materials and devices to magnetic fields
Abstract/Contents
- Abstract
- Scanning SQUID Microscopy (SSM) is a powerful tool for measuring nanoscale superconducting heterostructures. In this thesis, I describe results from several projects motivated by the goal of developing foundational models and characterization methods for engineering superconducting heterostructures. First, I discuss an approach to studying the dynamics of vortices in type-II superconductors, which creates unwanted dissipation in superconducting circuits, using a combination of SSM and 2D London modeling (Chapter 2). Next, I cover three projects studying materials systems engineered with the goal of achieving topologically nontrivial quasiparticle states called Majorana modes, which can be used to build qubits for fault-tolerant topological computing. Chapters 3-4 discuss interfacial and thickness effects and domain wall superconductivity in hybrid superconducting-semiconducting-ferromagnetic systems, and Chapter 5 presents SSM imaging results of diamagnetism and vortex motion in superconductor-topological insulator-superconductor junctions. Understanding these effects will be key to controlling the behavior of these devices in future iterations. Finally, Chapter 6 considers a model experimental system that mimics disorder in a natural 2D superconductor using an array of proximity-coupled superconducting islands with engineered disorder. Experimental susceptibility imaging results combined with Josephson Junction modeling show that these arrays can be described as arrays of superconductor-normal metal-superconductor junctions.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2022; ©2022 |
| Publication date | 2022; 2022 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Zhang, Irene Pu |
|---|---|
| Degree supervisor | Moler, Kathryn A |
| Thesis advisor | Moler, Kathryn A |
| Thesis advisor | Fisher, Ian R. (Ian Randal) |
| Thesis advisor | Goldhaber-Gordon, David, 1972- |
| Degree committee member | Fisher, Ian R. (Ian Randal) |
| Degree committee member | Goldhaber-Gordon, David, 1972- |
| Associated with | Stanford University, Department of Applied Physics |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Irene Pu Zhang. |
|---|---|
| Note | Submitted to the Department of Applied Physics. |
| Thesis | Thesis Ph.D. Stanford University 2022. |
| Location | https://purl.stanford.edu/sw651qr1102 |
Access conditions
- Copyright
- © 2022 by Irene Pu Zhang
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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