Spontaneous formation of vanadium "molecules" in a geometrically frustrated crystal: AlV2O4

Y. Horibe, M. Shingu, K. Kurushima, H. Ishibashi, N. Ikeda, K. Kato, Y. Motome, N. Furukawa, S. Mori, T. Katsufuji

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Abstract

We investigated the charge-ordered (CO) state in spinel AlV2O4 by electron diffraction, synchrotron x-ray diffraction, and magnetic measurements. It was found that the CO structure appearing below 700 K is characterized by the formation of V clusters (heptamers), each of which is consisting of 7 vanadium atoms and is in a spin-singlet state as a total. Theoretical consideration indicates that this unique molecularlike V heptamer is stabilized by a strong bonding of vanadium t2g orbitals.

Original languageEnglish
Article number086406
JournalPhysical Review Letters
Volume96
Issue number8
DOIs
Publication statusPublished - 2006 Mar 13

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Horibe, Y., Shingu, M., Kurushima, K., Ishibashi, H., Ikeda, N., Kato, K., Motome, Y., Furukawa, N., Mori, S., & Katsufuji, T. (2006). Spontaneous formation of vanadium "molecules" in a geometrically frustrated crystal: AlV2O4. Physical Review Letters, 96(8), [086406]. https://doi.org/10.1103/PhysRevLett.96.086406