Spin gap in Tl2Ru2O7 and the possible formation of Haldane chains in three-dimensional crystals

Seongsu Lee, J. G. Park, D. T. Adroja, D. Khomskii, S. Streltsov, K. A. McEwen, H. Sakai, K. Yoshimura, V. I. Anisimov, D. Mori, R. Kanno, R. Ibberson

Research output: Contribution to journalArticlepeer-review

103 Citations (Scopus)

Abstract

The spin gap in Tl2Ru2O7 and the formation of haldane chains in three-dimensional crystals were analyzed. The compound formed in a cubic pyrochlore structure with the space group for Fd3m and a=10.17936 Å. When it had undergone the metal-insulator transition, the crystal structure transformed the cubic pyrochlore structures to the orthorhombic structure. A drastic drop in bulk susceptibility at the meta-insulator transition suggested that the transition should be accompanied by a strong change in spin spectrum. The metal-insulator transition in Tl 2Ru2O7 accompanied by a structural transition with the formation of a spin gap is found to be the first case of the spontaneous formation of 1D Haldane chain with the spin gap out of a 3D cubic structure.

Original languageEnglish
Pages (from-to)471-476
Number of pages6
JournalNature Materials
Volume5
Issue number6
DOIs
Publication statusPublished - 10 Jun 2006
Externally publishedYes

Fingerprint

Dive into the research topics of 'Spin gap in Tl2Ru2O7 and the possible formation of Haldane chains in three-dimensional crystals'. Together they form a unique fingerprint.

Cite this