## 抄録

(formula presented) 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 (formula presented) 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 (formula presented) octahedron. The calculated result is consistent with the electronic phase diagram of (formula presented).

本文言語 | English |
---|---|

ページ（範囲） | 1-4 |

ページ数 | 4 |

ジャーナル | Physical Review B - Condensed Matter and Materials Physics |

巻 | 66 |

号 | 2 |

DOI | |

出版ステータス | Published - 2002 1月 1 |

外部発表 | はい |

## ASJC Scopus subject areas

- 電子材料、光学材料、および磁性材料
- 凝縮系物理学