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Visualizing Topology and Correlation in Quantum Materials: A View From Lattice Geometry
Visualizing Topology and Correlation in Quantum Materials: A View From Lattice Geometry
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104811
- ISBN
- 9798293894413
- DDC
- 530
- 저자명
- Jiang, Yuxiao.
- 서명/저자
- Visualizing Topology and Correlation in Quantum Materials: A View From Lattice Geometry
- 발행사항
- [Sl] : Princeton University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 148 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
- 주기사항
- Advisor: Hasan, M. Zahid.
- 학위논문주기
- Thesis (Ph.D.)--Princeton University, 2025.
- 초록/해제
- 요약Quantum materials, systems in which quantum effects play a defining role in determining physical properties, are essential for both fundamental research and future technological applications. Topology and correlation represent two central themes in modern condensed matter physics. This thesis presents an experimental investigation of topological and correlated phases in a range of quantum materials, with a particular focus on the role of lattice geometry. We demonstrate that lattice geometry not only influences the emergent quantum phases but also provides a predictive and tunable platform for exploring the interplay between topology and correlation.The first part of this thesis focuses on materials with a kagome lattice structure, where geometric frustration and symmetry give rise to rich emergent behavior. Using STM, we reveal symmetry-breaking phases in KV3Sb5, FeGe, and ScV6Sn6, including charge density wave, magnetism, and rotational symmetry breaking. These phenomena arise from the unique kagome band structure, featuring flat bands, Dirac points, and van Hove singularities that promote electronic instability.We then explore how measurement geometry, particularly edge terminations and crystal step boundaries, allows STM to probe the bulk-boundary correspondence central to topological phases. In α-arsenic, STM measurements on specific edge configurations reveal a hybrid topological state featuring both first- and higher-order topological characteristics. Finally, we study the quasi-one-dimensional compound Ta2Pd3Te5, where Coulomb attraction leads to an excitonic insulating phase. STM reveals topological edge modes that emerge within this correlated state, suggesting a realization of a topological excitonic insulator.Together, these studies highlight the power of STM in visualizing how lattice geometry governs topological and correlated phenomena. By resolving spatial symmetry, edge structure, and electronic texture at the atomic scale, this work provides new insight into the mechanisms behind quantum order and offers a framework for discovering and designing functional quantum materials.
- 일반주제명
- Condensed matter physics
- 일반주제명
- Materials science
- 일반주제명
- Quantum physics
- 키워드
- Topology
- 키워드
- Lattice geometry
- 키워드
- Correlation
- 기타저자
- Princeton University Chemistry
- 기본자료저록
- Dissertations Abstracts International. 87-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202104811
■006m o d
■007cr#unu||||||||
■020 ▼a9798293894413
■035 ▼a(MiAaPQ)AAI32167312
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aJiang, Yuxiao.
■24510▼aVisualizing Topology and Correlation in Quantum Materials: A View From Lattice Geometry
■260 ▼a[Sl]▼bPrinceton University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a148 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-04, Section: B.
■500 ▼aAdvisor: Hasan, M. Zahid.
■5021 ▼aThesis (Ph.D.)--Princeton University, 2025.
■520 ▼aQuantum materials, systems in which quantum effects play a defining role in determining physical properties, are essential for both fundamental research and future technological applications. Topology and correlation represent two central themes in modern condensed matter physics. This thesis presents an experimental investigation of topological and correlated phases in a range of quantum materials, with a particular focus on the role of lattice geometry. We demonstrate that lattice geometry not only influences the emergent quantum phases but also provides a predictive and tunable platform for exploring the interplay between topology and correlation.The first part of this thesis focuses on materials with a kagome lattice structure, where geometric frustration and symmetry give rise to rich emergent behavior. Using STM, we reveal symmetry-breaking phases in KV3Sb5, FeGe, and ScV6Sn6, including charge density wave, magnetism, and rotational symmetry breaking. These phenomena arise from the unique kagome band structure, featuring flat bands, Dirac points, and van Hove singularities that promote electronic instability.We then explore how measurement geometry, particularly edge terminations and crystal step boundaries, allows STM to probe the bulk-boundary correspondence central to topological phases. In α-arsenic, STM measurements on specific edge configurations reveal a hybrid topological state featuring both first- and higher-order topological characteristics. Finally, we study the quasi-one-dimensional compound Ta2Pd3Te5, where Coulomb attraction leads to an excitonic insulating phase. STM reveals topological edge modes that emerge within this correlated state, suggesting a realization of a topological excitonic insulator.Together, these studies highlight the power of STM in visualizing how lattice geometry governs topological and correlated phenomena. By resolving spatial symmetry, edge structure, and electronic texture at the atomic scale, this work provides new insight into the mechanisms behind quantum order and offers a framework for discovering and designing functional quantum materials.
■590 ▼aSchool code: 0181.
■650 4▼aCondensed matter physics
■650 4▼aMaterials science
■650 4▼aQuantum physics
■653 ▼aQuantum materials
■653 ▼aTopology
■653 ▼aLattice geometry
■653 ▼aCorrelation
■690 ▼a0611
■690 ▼a0599
■690 ▼a0794
■71020▼aPrinceton University▼bChemistry.
■7730 ▼tDissertations Abstracts International▼g87-04B.
■790 ▼a0181
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358932▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
