Material Type  

 학위논문

 

0017163453

Date and Time of Latest Transaction  

20250211152710

ISBN  

9798384094913

DDC  

530

Author  

Cai, Jiaqi.

Title/Author  

Integer and Fractional Chern Insulators in Two-Dimensional van der Waals Heterostructures.

Publish Info  

[S.l.] : University of Washington., 2024

Publish Info  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Material Info  

101 p.

General Note  

Source: Dissertations Abstracts International, Volume: 86-03, Section: B.

General Note  

Advisor: Xu, Xiaodong.

학위논문주기  

Thesis (Ph.D.)--University of Washington, 2024.

Abstracts/Etc  

요약New developments in van der Waals materials and fabrication techniques bring new opportunities for investigating emergent quantum phases of matter in two dimensions. Chern insulator is a notable example, characterized by the Chern number C. The Chern insulator is remarked as the lattice version of quantum Hall effect, and has vanishing longitudinal resistance and quantized Hall resistance of h/Ce2, where h is the Planck constant and e is the electron charge. This thesis investigates novel Chern insulators enriched by magnetism, pseudospin degrees of freedom, and translational symmetry. The discovery is enabled by new materials that incorporate intrinsic magnetism into topological insulators, or new control knobs such as the twist angle between layers that can lead to strong interaction and spontaneous magnetism. The interplay between topology and the above ingredients deepens our understanding of the topological phase of matter and also seeks device applications. Another family of novel Chern insulators, the fractional Chern insulator, is a strongly correlated phase that has fractionally charged excitations, anyons. It is characterized by a non-integer rational many-body Chern number (C ∈ Q/Z). This lattice analogy of fractional quantum Hall states can exist at elevated temperatures and in zero magnetic field and could facilitate anyonic research into a more experimentally accessible regime. This state of matter, and the associated fractional quantum anomalous Hall effect, is discovered in the twisted molybdenum ditelluride (MoTe2) moire superlattice and will be another central topic of this thesis.

Subject Added Entry-Topical Term  

Physics.

Subject Added Entry-Topical Term  

Applied physics.

Subject Added Entry-Topical Term  

Condensed matter physics.

Subject Added Entry-Topical Term  

Theoretical physics.

Subject Added Entry-Topical Term  

Optics.

Index Term-Uncontrolled  

Topological insulators

Index Term-Uncontrolled  

Chern number

Index Term-Uncontrolled  

Quantum Hall states

Index Term-Uncontrolled  

Transport

Index Term-Uncontrolled  

Two dimensional material

Added Entry-Corporate Name  

University of Washington Physics

Host Item Entry  

Dissertations Abstracts International. 86-03B.

Electronic Location and Access  

로그인을 한후 보실 수 있는 자료입니다.

Control Number  

joongbu:655976