서브메뉴
검색
Correlated Electronic Structure Theory for Interfacial Chemistry and Excited States of Extended Systems
Correlated Electronic Structure Theory for Interfacial Chemistry and Excited States of Extended Systems
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105157
- ISBN
- 9798297607712
- DDC
- 542
- 저자명
- Vo, Ethan Anh.
- 서명/저자
- Correlated Electronic Structure Theory for Interfacial Chemistry and Excited States of Extended Systems
- 발행사항
- [Sl] : Columbia University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 86 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
- 주기사항
- Advisor: Berkelbach, Timothy C.
- 학위논문주기
- Thesis (Ph.D.)--Columbia University, 2025.
- 초록/해제
- 요약I begin by discussing the fundamentals of wave function theory, focusing on Hartree-Fock as the foundation of most quantum chemistry methods. I then provide details on basis sets and the formalism of second quantization, followed by an overview of configuration interaction. Building on this, I present the formalism of coupled-cluster theory and equation-of-motion coupled-cluster theory, and finally, I describe how these methods can be extended to treat periodic systems.In Chapter 2, I explore valence excitations of semiconductors and insulators with correlated wave function theory. I calculate the band gaps of 12 inorganic semiconductors and insulators composed of first- through third-row elements using periodic equation-of-motion coupled-cluster theory with single and double excitations (EOM-CCSD) and atom-centered triple-zeta basis sets with up to 64 k-points. I analyze convergence with respect to orbital and k-point sampling, applying composite corrections and extrapolations to obtain final values. At the end of this chapter, I discover the performance of EOM-CCSD relative to workhorse methods in the community and how it fares against approximate excited state wave function methods.Chapter 3, I report core binding energies for K-edge and L-edge transitions in simple semiconducting and insulating solids using periodic EOM-CCSD. My all-electron calculations employ triple-zeta basis sets with core correlation and Brillouin zone sampling of up to 4 x 4 x 4 k-points. Final values are obtained through composite corrections and extrapolation to the thermodynamic limit, yielding errors comparable to the accuracy of CCSD for molecular systems. The low-scaling approximation to EOM-CCSD achieves slightly reduced accuracy, but at significantly lower computational cost.In the final chapter, I apply density functional theory and coupled cluster theory to investigate electrolyte decomposition on lithium metal surfaces, a key phenomenon in energy materials science. To enable the use of mature molecular quantum chemistry methods, I segment the adsorbed molecule-lithium system into molecular clusters. I find that even small, computationally tractable clusters, when combined with composite corrections from basis set and method refinements, can serve as an effective tool for identifying high-performing functionals and for parameterizing machine-learned force fields.
- 일반주제명
- Computational chemistry
- 일반주제명
- Quantum physics
- 일반주제명
- Materials science
- 일반주제명
- Analytical chemistry
- 키워드
- Catalysis
- 키워드
- Extended systems
- 키워드
- Semiconductors
- 키워드
- Lithium
- 기타저자
- Columbia University Chemical Physics
- 기본자료저록
- Dissertations Abstracts International. 87-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017359676
■00520260202105157
■006m o d
■007cr#unu||||||||
■020 ▼a9798297607712
■035 ▼a(MiAaPQ)AAI32243378
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a542
■1001 ▼aVo, Ethan Anh.
■24510▼aCorrelated Electronic Structure Theory for Interfacial Chemistry and Excited States of Extended Systems
■260 ▼a[Sl]▼bColumbia University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a86 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-04, Section: B.
■500 ▼aAdvisor: Berkelbach, Timothy C.
■5021 ▼aThesis (Ph.D.)--Columbia University, 2025.
■520 ▼aI begin by discussing the fundamentals of wave function theory, focusing on Hartree-Fock as the foundation of most quantum chemistry methods. I then provide details on basis sets and the formalism of second quantization, followed by an overview of configuration interaction. Building on this, I present the formalism of coupled-cluster theory and equation-of-motion coupled-cluster theory, and finally, I describe how these methods can be extended to treat periodic systems.In Chapter 2, I explore valence excitations of semiconductors and insulators with correlated wave function theory. I calculate the band gaps of 12 inorganic semiconductors and insulators composed of first- through third-row elements using periodic equation-of-motion coupled-cluster theory with single and double excitations (EOM-CCSD) and atom-centered triple-zeta basis sets with up to 64 k-points. I analyze convergence with respect to orbital and k-point sampling, applying composite corrections and extrapolations to obtain final values. At the end of this chapter, I discover the performance of EOM-CCSD relative to workhorse methods in the community and how it fares against approximate excited state wave function methods.Chapter 3, I report core binding energies for K-edge and L-edge transitions in simple semiconducting and insulating solids using periodic EOM-CCSD. My all-electron calculations employ triple-zeta basis sets with core correlation and Brillouin zone sampling of up to 4 x 4 x 4 k-points. Final values are obtained through composite corrections and extrapolation to the thermodynamic limit, yielding errors comparable to the accuracy of CCSD for molecular systems. The low-scaling approximation to EOM-CCSD achieves slightly reduced accuracy, but at significantly lower computational cost.In the final chapter, I apply density functional theory and coupled cluster theory to investigate electrolyte decomposition on lithium metal surfaces, a key phenomenon in energy materials science. To enable the use of mature molecular quantum chemistry methods, I segment the adsorbed molecule-lithium system into molecular clusters. I find that even small, computationally tractable clusters, when combined with composite corrections from basis set and method refinements, can serve as an effective tool for identifying high-performing functionals and for parameterizing machine-learned force fields.
■590 ▼aSchool code: 0054.
■650 4▼aComputational chemistry
■650 4▼aQuantum physics
■650 4▼aMaterials science
■650 4▼aAnalytical chemistry
■653 ▼aCatalysis
■653 ▼aElectronic structure
■653 ▼aExtended systems
■653 ▼aSemiconductors
■653 ▼aLithium
■690 ▼a0219
■690 ▼a0794
■690 ▼a0599
■690 ▼a0486
■71020▼aColumbia University▼bChemical Physics.
■7730 ▼tDissertations Abstracts International▼g87-04B.
■790 ▼a0054
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359676▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


