Structural Transition with a Sharp Change in the Electrical Resistivity and Spin-Orbit Mott Insulating State in a Rhenium Oxide, Sr3 Re2 O9
Journal article, 2021
We report the successful synthesis, crystal structure, and electrical properties of Sr3Re2O9, which contains Re6+ with the 5d1 configuration. This compound is isostructural with Ba3Re2O9 and shows a first-order structural phase transition at ∼370 K. The low-temperature (LT) phase crystallizes in a hettotype structure of Ba3Re2O9, which is different from that of the LT phase of Sr3W2O9, suggesting that the electronic state of Re6+ plays an important role in determining the crystal structure of the LT phase. The structural transition is accompanied by a sharp change in the electrical resistivity. This is likely a metal-insulator transition, as suggested by the electronic band calculation and magnetic susceptibility. In the LT phase, the ReO6 octahedra are rotated in a pseudo-a0a0a+ manner in Glazer notation, which corresponds to C-type orbital ordering. Paramagnetic dipole moments were confirmed to exist in the LT phase by muon spin rotation and relaxation measurements. However, the dipole moments shrink greatly because of the strong spin-orbit coupling in the Re ions. Thus, the electronic state of the LT phase corresponds to a Mott insulating state with strong spin-orbit interactions at the Re sites.
Author
Daisuke Urushihara
Nagoya Institute of Technology
Toru Asaka
Nagoya Institute of Technology
Koichiro Fukuda
Nagoya Institute of Technology
Masanobu Nakayama
Kyoto University
Nagoya Institute of Technology
National Institute for Materials Science (NIMS)
Yuki Nakahira
Hiroshima University
Chikako Moriyoshi
Hiroshima University
Yoshihiro Kuroiwa
Hiroshima University
Ola Kenji Forslund
Royal Institute of Technology (KTH)
Nami Matsubara
Royal Institute of Technology (KTH)
Martin Månsson
Royal Institute of Technology (KTH)
Konstantinos Papadopoulos
Chalmers, Physics, Materials Physics
Yasmine Sassa
Chalmers, Physics, Materials Physics
Kazuki Ohishi
Comprehensive Research Organization for Science and Society (CROSS)
Jun Sugiyama
Comprehensive Research Organization for Science and Society (CROSS)
Yoshitaka Matsushita
National Institute for Materials Science (NIMS)
Hiroya Sakurai
National Institute for Materials Science (NIMS)
Inorganic Chemistry
0020-1669 (ISSN) 1520-510X (eISSN)
Vol. 60 2 507-514Subject Categories
Inorganic Chemistry
Materials Chemistry
Condensed Matter Physics
DOI
10.1021/acs.inorgchem.0c02750
PubMed
33395280