Role of charge transfer configurations in LaMnO3, CaMnO3, and CaFeO3

Aymeric Sadoc*, Ria Broer, Coen de Graaf

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

29 Citations (Scopus)
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Abstract

A simple scheme is proposed to analyze the N-electron wave function obtained in embedded cluster calculations in valence bond terms such as ligand-to-metal charge transfer and non-charge-transfer determinants. The analysis is based on a unitary transformation of pairs of natural orbitals to optimal atomiclike orbitals. The procedure is applied to compare the degree of ionicity in NiO and MnO and to explain the existence or absence of Jahn-Teller distortions in LaMnO3, CaMnO3, and CaFeO3. The authors find that the ground state of LaMnO3 is dominated by non-charge-transfer configurations, whereas the charge transfer configurations dominate the ground state wave function in the other two perovskites. (c) 2007 American Institute of Physics.

Original languageEnglish
Article number134709
Number of pages9
JournalJournal of Chemical Physics
Volume126
Issue number13
DOIs
Publication statusPublished - 7-Apr-2007

Keywords

  • 2ND-ORDER PERTURBATION-THEORY
  • MOLECULAR WAVE-FUNCTIONS
  • TRANSITION-METAL ATOMS
  • ANO BASIS-SETS
  • AB-INITIO
  • NEUTRON-DIFFRACTION
  • EXCITED-STATES
  • BOND
  • DENSITY
  • SPECTRA

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