Structural Studies on the Phase Transition of La3Ni2O6.92 at about 550 K

Hisashi Sasaki, Hiroshi Harashina, Satoshi Taniguchi, Mayumi Kasai, Yoshiaki Kobayashi, Masatoshi Sato, Takashi Kobayashi, Tomohiro Ikeda, Masaki Takata, Makoto Sakata

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Structural studies of La3Ni2O6.92 with a double layered perovskite structure have been performed by the X-ray Rietveld analyses between 300K and 650K. The interatomic distance between Ni and the apical oxygen (on the outside of NiO2 double layer) rapidly increases around the phase-transition temperature TB ∼ 550K with decreasing temperature. Then, the energy of the (3z2-r2) band is considered to shift downwards with respect to that of the (x2-y2) band with decreasing temperature and the lower Hubbard band of the former becomes to be (almost) fully occupied at the transition temperature, which induces the Mott transition (delocalized-localized transition) of the (3z2-r2) electrons.

Original languageEnglish
Pages (from-to)1693-1697
Number of pages5
Journaljournal of the physical society of japan
Volume66
Issue number6
DOIs
Publication statusPublished - 1997 Jan 1
Externally publishedYes

Keywords

  • LaNiO
  • Mott transition
  • Rietveld analysis

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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