Orbital state and metal-insulator transition in Ca2-xSrxRuO4 studied by model Hartree-Fock calculations

M. Kurokawa, Takashi Mizokawa

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Ca2-xSrxRuO4 is a quasi-two-dimensional Mott transition system. We have studied the relationship between the metal-insulator transition and the changes of orbital states using model Hartree-Fock calculations. As the d-d Coulomb interaction increases, the ground state changes from paramagnetic metal (PM) to antiferromagnetic metal (AFM) to antiferromagnetic insulator (AFI). Magnetic anisotropy is strong in the AFI state due to the spin-orbit interaction while it is weak in the AFM state. It has been found that the magnetic anisotropy is controlled by the Jahn-Teller distortion. We have also investigated the effect of the tilting and rotation of the RuO6 octahedron. The calculated result is consistent with the electronic phase diagram of Ca2-xSrxRuO4.

Original languageEnglish
Article number024434
Pages (from-to)244341-244344
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number2
Publication statusPublished - 2002 Jul 1
Externally publishedYes

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Metal insulator transition
Metals
Magnetic anisotropy
insulators
orbitals
metals
Jahn-Teller effect
Coulomb interactions
Ground state
anisotropy
Phase diagrams
Orbits
spin-orbit interactions
phase diagrams
ground state
electronics
interactions

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Orbital state and metal-insulator transition in Ca2-xSrxRuO4 studied by model Hartree-Fock calculations. / Kurokawa, M.; Mizokawa, Takashi.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 66, No. 2, 024434, 01.07.2002, p. 244341-244344.

Research output: Contribution to journalArticle

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