Development of spin-dependent relativistic open-shell Hartree–Fock theory with time-reversal symmetry (I): The unrestricted approach

Masahiko Nakano, Junji Seino, Hiromi Nakai

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

An open-shell Hartree–Fock (HF) theory for spin-dependent, two-component relativistic calculations, termed the Kramers-unrestricted HF (KUHF) method, is developed. The present KUHF method, which is formulated as a relativistic counterpart of nonrelativistic UHF, is based on quaternion algebra and partly uses time-reversal symmetry. The fundamental characteristics of KUHF are discussed in this study. From numerical assessments, it was revealed that KUHF gives a corresponding solution to nonrelativistic UHF; furthermore, KUHF properly describes spin-orbit interactions. In addition, KUHF can improve the self-consistent field convergence behavior in spin-dependent calculations, for example, for f-block elements.

Original languageEnglish
Article numbere25356
JournalInternational Journal of Quantum Chemistry
Volume117
Issue number10
DOIs
Publication statusPublished - 2017 May 15

Keywords

  • Kramers-unrestricted Hartree–Fock method
  • open-shell system
  • spin-dependent two-component relativistic calculation
  • time-reversal symmetry

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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