Exploring Moiré Transition Metal Dichalcogenide Heterostructures

<a href="https://embed.stanford.edu/iframe/?url=https%3A%2F%2Fpurl.stanford.edu%2Fkq565vk7202" class="su-underline">Show Content</a>

Abstract/Contents

Abstract: In recent years moiré transition metal dichalogenide (TMD) heterostructures have been studied extensively, realizing a tunable platform to study electronic correlations. In this thesis, we describe efforts to develop new moiré TMD device architectures to study and tune interacting ground states and characterize them using electrical transport measurements. We focus in particular on a novel geometry, using bilayer graphene as a sensing layer to measure the chemical potential of a WS2/WSe2 heterobilayer. We observe interaction-driven gaps in the TMD bilayer in agreement with previous work upon both electron and hole doping. We also discuss preliminary attempts to tune the TMD superlattice potential and Coulomb screening in situ, though these remain inconclusive so far. Our work highlights some of the experimental challenges involved in fabricating moiré TMD devices, and we end with an outlook on improving future devices.

Type of resource	text
Publication date	May 17, 2023; May 2023

Author	Wang, David	https://orcid.org/0009-0000-4316-1144 (unverified)
Thesis advisor	Feldman, Benjamin	https://orcid.org/0000-0002-4962-0548 (unverified)
Thesis advisor	Goldhaber-Gordon, David	https://orcid.org/0000-0001-8549-0560 (unverified)
Degree granting institution	Stanford University
Department	Department of Physics

Subject	Transition metal dichalcogenide
Subject	Moiré heterostructure
Subject	Heterobilayer
Subject	WS2/WSe2
Subject	Superlattices
Genre	Text
Genre	Thesis

DOI	https://doi.org/10.25740/kq565vk7202
Location	https://purl.stanford.edu/kq565vk7202

Use and reproduction: User agrees that, where applicable, content will not be used to identify or to otherwise infringe the privacy or confidentiality rights of individuals. Content distributed via the Stanford Digital Repository may be subject to additional license and use restrictions applied by the depositor.
License: This work is licensed under a Creative Commons Attribution Non Commercial 4.0 International license (CC BY-NC).

Preferred citation: Wang, D. (2023). Exploring Moiré Transition Metal Dichalcogenide Heterostructures. Stanford Digital Repository. Available at https://purl.stanford.edu/kq565vk7202. https://doi.org/10.25740/kq565vk7202.

Undergraduate Theses, Department of Physics

Loading usage metrics...