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Integer and Fractional Chern Insulat...

Cai, Jiaqi,

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

Record Type:	Electronic resources : Monograph/item
Title/Author:	Integer and Fractional Chern Insulators in Two-Dimensional van der Waals Heterostructures // Jiaqi Cai.
Author:	Cai, Jiaqi,
Description:	1 electronic resource (101 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
Contained By:	Dissertations Abstracts International86-03B.
Subject:	Physics. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31488590
ISBN:	9798384094913

Integer and Fractional Chern Insulators in Two-Dimensional van der Waals Heterostructures /
Cai, Jiaqi,

Integer and Fractional Chern Insulators in Two-Dimensional van der Waals Heterostructures /Jiaqi Cai. - 1 electronic resource (101 pages)

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

New 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.

English

ISBN: 9798384094913Subjects--Topical Terms:

516296
Physics.
Subjects--Index Terms:

Topological insulators

Integer and Fractional Chern Insulators in Two-Dimensional van der Waals Heterostructures /
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100 1 $a Cai, Jiaqi, $e author. $3 3822661
245 1 0 $a Integer and Fractional Chern Insulators in Two-Dimensional van der Waals Heterostructures / $c Jiaqi Cai.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 1 electronic resource (101 pages)
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500 $a Advisors: Xu, Xiaodong Committee members: Cobden, David; Xiao, Di.
502 $b Ph.D. $c University of Washington $d 2024.
520 $a New 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.
546 $a English
590 $a School code: 0250
650 4 $a Physics. $3 516296
650 4 $a Applied physics. $3 3343996
650 4 $a Condensed matter physics. $3 3173567
650 4 $a Theoretical physics. $3 2144760
650 4 $a Optics. $3 517925
653 $a Topological insulators
653 $a Chern number
653 $a Quantum Hall states
653 $a Transport
653 $a Two dimensional material
690 $a 0605
690 $a 0752
690 $a 0753
690 $a 0611
690 $a 0215
710 2 $a University of Washington. $b Physics. $e degree granting institution. $3 3816472
720 1 $a Xu, Xiaodong $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 86-03B.
790 $a 0250
791 $a Ph.D.
792 $a 2024
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31488590