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Electronic Correlations, Topology, and Unconventional Superconductivity in Twisted Bilayer Graphene- [electronic resource]
Electronic Correlations, Topology, and Unconventional Superconductivity in Twisted Bilayer Graphene- [electronic resource]
상세정보
- 자료유형
- 학위논문파일 국외
- 최종처리일시
- 20240214100445
- ISBN
- 9798379717179
- DDC
- 530
- 서명/저자
- Electronic Correlations, Topology, and Unconventional Superconductivity in Twisted Bilayer Graphene - [electronic resource]
- 발행사항
- [S.l.]: : Princeton University., 2023
- 발행사항
- Ann Arbor : : ProQuest Dissertations & Theses,, 2023
- 형태사항
- 1 online resource(212 p.)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 84-12, Section: B.
- 주기사항
- Advisor: Yazdani, Ali.
- 학위논문주기
- Thesis (Ph.D.)--Princeton University, 2023.
- 사용제한주기
- This item must not be sold to any third party vendors.
- 초록/해제
- 요약Contemporary quantum materials research is guided by themes of topology - the idea that some material properties can be protected against continuous deformation - and of electronic correlations - the idea that the emergent behavior of a collection of electrons is complex and cannot be reduced to the sum of its parts. A natural confluence of these two themes can be engineered in so-called "moire materials", an emerging class of two-dimensional (2D) materials produced by the rotational or lattice misalignment of atomically thin crystals. The prototypical example of this new paradigm is magic-angle twisted bilayer graphene (MATBG), where two atomically thin sheets of carbon, twisted to exactly 1.1 degrees relative to one another, hosts correlated insulating, magnetic topological, and unconventional superconducting states, none of which are found in graphene itself. In this thesis, I discuss a series of experiments that leverage the unparalleled capabilities of scanning tunneling microscopy / spectroscopy (STM / STS) to elucidate the microscopic underpinnings of MATBG. STM / STS is a powerful tool that can probe electronic dynamics with subatomic spatial resolution and unmatched energy resolution. We use STS as a novel thermodynamic sensor to identify a cascade of electronic transitions among correlated metallic phases, and as a novel probe of many-body topology to detect magnetic topological insulators in MATBG. We combine STS with point-contact spectroscopy to establish the unconventional nature of superconductivity in MATBG. Finally, we use the high-resolution imaging capabilities of the STM to probe the many-body wavefunctions of the correlated phases in MATBG, uncovering intricate atomic-scale patterns that encode important information about the origins of these phases.
- 일반주제명
- Materials science.
- 일반주제명
- Applied physics.
- 키워드
- Bilayer graphene
- 기타저자
- Princeton University Physics
- 기본자료저록
- Dissertations Abstracts International. 84-12B.
- 기본자료저록
- Dissertation Abstract International
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520240214100445
■006m o d
■007cr#unu||||||||
■020 ▼a9798379717179
■035 ▼a(MiAaPQ)AAI30491731
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aNuckolls, Kevin Peter.
■24510▼aElectronic Correlations, Topology, and Unconventional Superconductivity in Twisted Bilayer Graphene▼h[electronic resource]
■260 ▼a[S.l.]:▼bPrinceton University. ▼c2023
■260 1▼aAnn Arbor :▼bProQuest Dissertations & Theses, ▼c2023
■300 ▼a1 online resource(212 p.)
■500 ▼aSource: Dissertations Abstracts International, Volume: 84-12, Section: B.
■500 ▼aAdvisor: Yazdani, Ali.
■5021 ▼aThesis (Ph.D.)--Princeton University, 2023.
■506 ▼aThis item must not be sold to any third party vendors.
■520 ▼aContemporary quantum materials research is guided by themes of topology - the idea that some material properties can be protected against continuous deformation - and of electronic correlations - the idea that the emergent behavior of a collection of electrons is complex and cannot be reduced to the sum of its parts. A natural confluence of these two themes can be engineered in so-called "moire materials", an emerging class of two-dimensional (2D) materials produced by the rotational or lattice misalignment of atomically thin crystals. The prototypical example of this new paradigm is magic-angle twisted bilayer graphene (MATBG), where two atomically thin sheets of carbon, twisted to exactly 1.1 degrees relative to one another, hosts correlated insulating, magnetic topological, and unconventional superconducting states, none of which are found in graphene itself. In this thesis, I discuss a series of experiments that leverage the unparalleled capabilities of scanning tunneling microscopy / spectroscopy (STM / STS) to elucidate the microscopic underpinnings of MATBG. STM / STS is a powerful tool that can probe electronic dynamics with subatomic spatial resolution and unmatched energy resolution. We use STS as a novel thermodynamic sensor to identify a cascade of electronic transitions among correlated metallic phases, and as a novel probe of many-body topology to detect magnetic topological insulators in MATBG. We combine STS with point-contact spectroscopy to establish the unconventional nature of superconductivity in MATBG. Finally, we use the high-resolution imaging capabilities of the STM to probe the many-body wavefunctions of the correlated phases in MATBG, uncovering intricate atomic-scale patterns that encode important information about the origins of these phases.
■590 ▼aSchool code: 0181.
■650 4▼aCondensed matter physics.
■650 4▼aMaterials science.
■650 4▼aApplied physics.
■653 ▼aElectronic correlations
■653 ▼aSuperconductivity
■653 ▼aQuantum materials
■653 ▼aHigh-resolution imaging
■653 ▼aBilayer graphene
■690 ▼a0611
■690 ▼a0794
■690 ▼a0215
■71020▼aPrinceton University▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g84-12B.
■773 ▼tDissertation Abstract International
■790 ▼a0181
■791 ▼aPh.D.
■792 ▼a2023
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16932344▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
■980 ▼a202402▼f2024
