2005/05/31 by Katsunori Kubo, Takashi Hotta
Engineering · Materials Science · Physics and Astronomy · #Computer science #Nuclear Materials and Properties #Rare-earth and actinide compounds #Thermodynamic and Structural Properties of Metals and Alloys #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.72.132411
published as Phys. Rev. B 72, 132411 (2005) · 4 pages, 3 figures
openalex publication_date 2005/10/26 · arxiv created 2005/10/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In order to examine the origin of octupole ordering in NpO2, we propose a microscopic model constituted of neptunium 5f and oxygen 2p orbitals. To study multipole ordering, we derive effective multipole interactions from the f\text\ensuremath-p model by using the fourth-order perturbation theory in terms of p\text\ensuremath-f hopping integrals. Analyzing the effective model numerically, we find a tendency toward \ensuremathΓ5u antiferro-octupole ordering.