Skip navigation
Please use this identifier to cite or link to this item:
Title: Visualizing emergent phenomena in quantum materials: from Majorana zero mode to many-body correlations
Authors: Xie, Yonglong
Advisors: Yazdani, Ali
Contributors: Physics Department
Keywords: Magic-angle twisted bilayer graphene
Majorana zero mode
Many-body correlation
Scanning tunneling microscopy
Spin-polarized scanning tunneling microscopy
Topological superconductor
Subjects: Condensed matter physics
Issue Date: 2019
Publisher: Princeton, NJ : Princeton University
Abstract: Topology and correlation, fundamental ingredients that often dictate the ground states of quantum matter, leave distinct local electronic fingerprints that can be detected with scanning tunneling microscopy (STM). In this dissertation, we first introduce a unique spin signature of Majorana zero mode (MZM) in atomic chains and present how we detect it using spin-resolved measurements with a STM. Second, we will describe a series of experiments demonstrating how the combined influence of magnetism and superconductivity on the one-dimensional helical hinge channel of a higher-order topological insulator can give rise to a MZM. Last, we will discuss unusual spectroscopic characteristics found on magic angle twisted bilayer graphene (MATBG) over a wide range of carrier densities, including where superconductivity has been reported to emerge, and how these correlated features allow us to establish a more concrete connection between MATBG and high-Tc cuprates beyond the phenomenological resemblance of their transport phase diagrams.
Alternate format: The Mudd Manuscript Library retains one bound copy of each dissertation. Search for these copies in the library's main catalog:
Type of Material: Academic dissertations (Ph.D.)
Language: en
Appears in Collections:Physics

Files in This Item:
File Description SizeFormat 
Xie_princeton_0181D_13186.pdf39.54 MBAdobe PDFView/Download

Items in Dataspace are protected by copyright, with all rights reserved, unless otherwise indicated.