Interpocket polarization model for ordering structures in rare-earth hexaborides

Yoshio Kuramoto, Katsunori Kubo

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


Origin of the common ordering structure in cubic rare-earth (R) hexaborides RB6 is ascribed to an RKKY polarization connecting different pockets of the conduction band. In order to account for the band structure common to RB6, a tight-binding model is used which reproduces the Fermi surface reasonably well. The model includes 2p t2u molecular orbitals for each B6 cluster and 5d eg orbitals for each rare-earth ion. The resultant intersite interaction I(q) gives rise to a broad maximum around q = (1/4,1/4,1/2) in the Brillouin zone, provided both 2p and 5d components of the conduction band participate in the exchange interaction. This wave number corresponds to the ordering pattern in GdB6 and some other rare-earth hexaborides.

Original languageEnglish
Pages (from-to)135-138
Number of pages4
JournalPhysica B: Condensed Matter
Issue number1-2
Publication statusPublished - 2003 Apr
EventT2PAM - Higashi-Hiroshima, Japan
Duration: 2002 Aug 162002 Aug 19


  • GdB
  • Interpocket polarization
  • RKKY interaction
  • Rare-earth hexaborides

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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