자료유형  

 학위논문

Control Number  

0016934476

International Standard Book Number  

9798380481939

Dewey Decimal Classification Number  

530

Main Entry-Personal Name  

Yu, Jiachen.

Publication, Distribution, etc. (Imprint  

[S.l.] : Stanford University., 2023

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2023

Physical Description  

1 online resource(214 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 85-04, Section: B.

General Note  

Advisor: Feldman, Ben;Goldhaber-Gordonon, David;Heinz, Tony;Bent, Stacey F.

Dissertation Note  

Thesis (Ph.D.)--Stanford University, 2023.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Summary, Etc.  

요약The emergence of "moir´e materials", heterostructures formed by twisting and stacking atomically thin layers, has inaugurated a new era for investigating correlated electronic systems. They o↵er unprecedented tunability over band structure, electronic interactions and topology. In this dissertation, I will present my works on the use of a specialized scanning probe microscope, a scanning single-electron transistor (SET), to locally investigate correlated states in a diverse array of moir´e systems. The SET probes the local compressibility and chemical potential of an electronic system with unparalleled resolution, enabling access to the delicate interaction-driven incompressible (insulating) phases and their phase transitions.In this dissertation, I will first summarize instrumentation e↵orts to set up two di↵erent scanning SET systems at Stanford University, which were used to carry out scientific projects described in this dissertation. I will then describe measurements on a selection of representative examples from two distinct classes of moir´e materials. In magic-angle twisted bilayer graphene, I explore both the interacting Chern and Hofstadter physics in the high magnetic field regime, as well as the enigmatic correlated insulators found at low magnetic fields. In a semiconductor moir´e heterobilayer WSe2/MoSe2, I describe measurements that reveal the coexistence of flat and dispersive moir´e bands that leads to intricate competitions between Hofstadter and unconventional charge-ordered states. In a twisted double bilayer WSe2 system, I discuss how the introduction of valley moir´e bands leads to new correlated ground states and charge excitations. Through these measurements, I will demonstrate how the local thermodynamic sensing capabilities of scanning SET synergize with the high tunability of moir´e materials in uncovering novel correlated electronic phases.

Subject Added Entry-Topical Term  

Phase transitions.

Subject Added Entry-Topical Term  

Software.

Subject Added Entry-Topical Term  

Physics.

Subject Added Entry-Topical Term  

Electrons.

Subject Added Entry-Topical Term  

Graphene.

Subject Added Entry-Topical Term  

Transistors.

Subject Added Entry-Topical Term  

Quantum dots.

Subject Added Entry-Topical Term  

Magnetic fields.

Subject Added Entry-Topical Term  

Atomic physics.

Subject Added Entry-Topical Term  

Electromagnetics.

Subject Added Entry-Topical Term  

Quantum physics.

Subject Added Entry-Topical Term  

Thermodynamics.

Added Entry-Corporate Name  

Stanford University.

Host Item Entry  

Dissertations Abstracts International. 85-04B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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Control Number  

joongbu:643336