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Correlated Electronic Structure Theory for Interfacial Chemistry and Excited States of Extended Systems
Correlated Electronic Structure Theory for Interfacial Chemistry and Excited States of Ext...
Correlated Electronic Structure Theory for Interfacial Chemistry and Excited States of Extended Systems

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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  
Electronic structure
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

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■040    ▼aMiAaPQ▼cMiAaPQ
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■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.

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