서브메뉴
검색
Doped Mott Hamiltonians
Doped Mott Hamiltonians
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105210
- ISBN
- 9798291563847
- DDC
- 530
- 저자명
- Yeo, Luke.
- 서명/저자
- Doped Mott Hamiltonians
- 발행사항
- [Sl] : University of Illinois at Urbana-Champaign, 2023
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2023
- 형태사항
- 95 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
- 주기사항
- Advisor: Clark, Bryan.
- 학위논문주기
- Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2023.
- 초록/해제
- 요약The cuprates, known to superconduct at exceptionally high temperatures when they are doped with holes, all descend from parent compounds that are standard Mott insulators. Because conductivity in these materials is dominated by transport within the copper-oxide planes, we focus our attention on the electronic structure of a single copper-oxide plane. These are well-described at low temperatures by the 2d Hubbard model, which, over the past sixty years, has been largely immune to analytic treatment in the physically relevant parameter regime. A simplification of the 2d Hubbard model is therefore in order, if we are to understand the microscopic basis for high-temperature superconductivity in the cuprates. While phase transitions around the Mott insulator lack a symmetry-based description, their phases are characterized by the spectral features associated with Mottness. These include a separation of spectral weight into upper and lower Hubbard bands, a Luttinger surface of zeros in the single-electron propagator, and spectral weight transfer from high to low energies. In this thesis, we turn from 2d Hubbard to the Hatsugai-Kohmoto (HK) model, which retains the features of Mottness while providing analytic traction. For instance, we can calculate all important physical observables as well as the finite- and zero-temperature state. In chapter 5, we examine entanglement and entropy across the interaction-driven metal-insulator transition in the HK model, finding features that distinguish the HK metal from Fermi liquid-like band metals. In chapter 6, we find that the HK metal is unstable to superconductivity and proceed to study a mean field theory of this superconducting phase. This superconductor displays a number of features found in the cuprates. These include Bogoliubov-like electronic excitations that descend from the HK metal and the appearance of a color change (i.e. the transfer of spectral weight from high to low energies brought about by the onset of superconductivity). Overall we find that this simple Hamiltonian can model coarse spectral features of the Mott insulating, metallic, and superconducting phases of the underdoped cuprates. Its simplicity provides a clear view of the microscopics that emerge as this doped Mott system and its superconducting instability.
- 일반주제명
- Condensed matter physics
- 일반주제명
- Theoretical physics
- 일반주제명
- Physical chemistry
- 일반주제명
- Materials science
- 키워드
- Mottness
- 키워드
- Cuprates
- 기타저자
- University of Illinois at Urbana-Champaign Physics
- 기본자료저록
- Dissertations Abstracts International. 87-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2023 us c eng d■001000017359768
■00520260202105210
■006m o d
■007cr#unu||||||||
■020 ▼a9798291563847
■035 ▼a(MiAaPQ)AAI32271365
■035 ▼a(MiAaPQ)httphdlhandlenet2142121389
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aYeo, Luke.
■24510▼aDoped Mott Hamiltonians
■260 ▼a[Sl]▼bUniversity of Illinois at Urbana-Champaign▼c2023
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2023
■300 ▼a95 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-02, Section: B.
■500 ▼aAdvisor: Clark, Bryan.
■5021 ▼aThesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2023.
■520 ▼aThe cuprates, known to superconduct at exceptionally high temperatures when they are doped with holes, all descend from parent compounds that are standard Mott insulators. Because conductivity in these materials is dominated by transport within the copper-oxide planes, we focus our attention on the electronic structure of a single copper-oxide plane. These are well-described at low temperatures by the 2d Hubbard model, which, over the past sixty years, has been largely immune to analytic treatment in the physically relevant parameter regime. A simplification of the 2d Hubbard model is therefore in order, if we are to understand the microscopic basis for high-temperature superconductivity in the cuprates. While phase transitions around the Mott insulator lack a symmetry-based description, their phases are characterized by the spectral features associated with Mottness. These include a separation of spectral weight into upper and lower Hubbard bands, a Luttinger surface of zeros in the single-electron propagator, and spectral weight transfer from high to low energies. In this thesis, we turn from 2d Hubbard to the Hatsugai-Kohmoto (HK) model, which retains the features of Mottness while providing analytic traction. For instance, we can calculate all important physical observables as well as the finite- and zero-temperature state. In chapter 5, we examine entanglement and entropy across the interaction-driven metal-insulator transition in the HK model, finding features that distinguish the HK metal from Fermi liquid-like band metals. In chapter 6, we find that the HK metal is unstable to superconductivity and proceed to study a mean field theory of this superconducting phase. This superconductor displays a number of features found in the cuprates. These include Bogoliubov-like electronic excitations that descend from the HK metal and the appearance of a color change (i.e. the transfer of spectral weight from high to low energies brought about by the onset of superconductivity). Overall we find that this simple Hamiltonian can model coarse spectral features of the Mott insulating, metallic, and superconducting phases of the underdoped cuprates. Its simplicity provides a clear view of the microscopics that emerge as this doped Mott system and its superconducting instability.
■590 ▼aSchool code: 0090.
■650 4▼aCondensed matter physics
■650 4▼aTheoretical physics
■650 4▼aPhysical chemistry
■650 4▼aMaterials science
■653 ▼aSuperconductivity
■653 ▼aMottness
■653 ▼aStrongly-correlated electrons
■653 ▼aCuprates
■653 ▼aCopper-oxide planes
■690 ▼a0611
■690 ▼a0753
■690 ▼a0794
■690 ▼a0494
■71020▼aUniversity of Illinois at Urbana-Champaign▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g87-02B.
■790 ▼a0090
■791 ▼aPh.D.
■792 ▼a2023
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359768▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


